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  1. CamelbackMike

    Annularia ??

    This is from the Anthracite coal region in Carbon County Penn. I thought it was Annularia but when I look at the pictures on the internet, it does not really seem to be a match.
  2. CamelbackMike

    Anthracite area fossil tree

    We found these "bark" pieces this past weekend at an Anthracite mine in Carbon County, Pennsylvania. The 3rd picture appears to be a different species and not similar to the diamond shaped things on Lepidodendron.
  3. Barrelcactusaddict

    Wyoming Amber in Matrix (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Specimen: 9.0g / 43x28x12mm Collected June 15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  4. Barrelcactusaddict

    Wyoming Amber in Matrix (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Specimen: 9.0g / 43x28x12mm Specimen pictured here is fluorescing under exposure to longwave UV light, and also illuminated by ambient LED light. Collected June 15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  5. Barrelcactusaddict

    VIDEO: Wyoming Amber (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  6. Barrelcactusaddict

    VIDEO: Wyoming Amber (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 432.5g of amber recovered; lot is initially displaying fluorescence under longwave ultraviolet light (365nm). "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  7. Barrelcactusaddict

    VIDEO: Wyoming Amber (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  8. From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  9. From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  10. Barrelcactusaddict

    Wyoming Amber in Matrix (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  11. Barrelcactusaddict

    Wyoming Amber in Matrix (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  12. Barrelcactusaddict

    Wyoming Amber in Matrix (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  13. Barrelcactusaddict

    Wyoming Amber in Matrix (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  14. Barrelcactusaddict

    Wyoming Amber (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  15. Barrelcactusaddict

    Wyoming Amber (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  16. Barrelcactusaddict

    Wyoming Amber (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  17. Barrelcactusaddict

    Wyoming Amber in Matrix (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  18. Barrelcactusaddict

    Wyoming Amber (Hanna Fm., ~57-56 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Field Collection: June 12-15, 2022 "Glory Hole" Site Hanna Basin Carbon County, WY Hanna Formation (~57-56 Ma) Deposit: *While amber is found throughout the Hanna Basin, only one site is known to yield large pieces of clear, stable amber: the locality known as "Glory Hole" is located within the north-central section of the Hanna Basin, in south-central Wyoming; exposures are positioned about 8,500 ft. above the base of the Hanna Fm., and at an elevation of roughly 8,900 ft. above sea level. Extensive layers of lignite and carbonaceous (lignitic) mudstone host abundant plant fossils and amber; the matrix is fissile (easily separated into thin layers) and friable (crumbly). Physical weathering (freeze-thaw, wind erosion, thermal expansion, etc.) of the exposures has created an expansive area of disintegrated substrate. This particular site was once a watery paleoenvironment, characterized by shallow swamps. At the very top of the bluff are layers of fissile, light-colored shale referred to as the "Upper Lacustrine Unit" of the Hanna Fm. Amber: *Occurring as small droplets, runs, and globular masses, much of the amber is transparent and of a reddish-orange color throughout, with some containing plentiful internal fractures. The intact, non-fractured amber is very hard, measuring 2.5-3.0 on the Mohs scale, being generally harder than Dominican and Chiapas ambers. It is very fragile and fractures easily, but takes a high, glassy polish like Myanmar amber. Through PyGC-MS, the amber is shown to come from a cupressaceous source tree, and is extremely similar chemically to cretaceous amber from the Raritan Fm. in New Jersey. Of several hundreds of pieces collected by some of the authors, et al., of the cited publication, prepared, and studied at the American Museum of Natural History, only one contained a single insect inclusion: a wingless thrips (1.1mm) that was heavily-compressed and deformed due to geologic forces. From my time at the site, I observed that much of the in-situ amber, especially large pieces, was concentrated within a short horizon only a couple feet in depth. It was especially common near buried, coalified remains of branches and logs, and matrix layers containing numerous leaf remains (mostly cupressaceous). Additionally, I've noticed that some of this material is fairly phosphorescent when exposed to longwave UV light. Minerals and Fossils: While collecting at the site, I noticed several other interesting features besides the amber I sought: carbonized leaves were present in some of the separated matrix layers, petrified wood was present in-situ and eroded from the matrix, and transparent gypsum crystals (some being relatively large) were commonly exposed along the site's surface. Also found in-situ were coalified twigs, branches, logs, and even stumps; I had partially uncovered a few such logs in my shallow excavations (6-12" deep) for amber. I observed a few stumps (~15" diameter) still preserved in an upright position, perpendicular to the matrix layers, with the majority of the lignitic remains buried beneath the surface. Recovered from coarse-grained sandstone originating from above the lignite deposits, was a partial angiosperm leaf imprint with distinct veins. Significance of Hanna Basin Deposits: *Throughout the Hanna Basin, amber is found in various quantities, physical conditions, sizes, and ages: the age range of the ambers' host strata sequence ranges from Late Cretaceous to Late Paleocene (76-56 Ma), an unprecedented range among all the world's known amber deposits. A stratigraphic interval more than 5 miles thick separates the highest and lowest occurrences of amber within the Hanna Basin. Paleocene amber is very rare, with only a handful of significant deposits in the world, notably from the Paris Basin and 5 localities in Switzerland. Source: * "Amber from Upper Cretaceous through Paleocene strata of the Hanna Basin, Wyoming, with evidence for source and taphonomy of fossil resins"; Rocky Mountain Geology, Vol. 35, No. 2, pp. 163-204, December 2000; David A. Grimaldi, Jason A. Lillegraven, Thomas W. Wampler, Denise Bookwalter, and Alexander Shedrinsky

    © Kaegen Lau

  19. I_gotta_rock

    Calamities Brand and Fern

    From the album: Carbondale, PA

    Carbondale, PA Lewellyn Formation Pennsylvanian period 299-323 myo
  20. I_gotta_rock

    Fern

    From the album: Carbondale, PA

    Carbondale, PA Lewellyn Formation Pennsylvanian period 299-323 myo
  21. I_gotta_rock

    Fern

    From the album: Carbondale, PA

    Carbondale, PA Lewellyn Formation Pennsylvanian period 299-323 myo
  22. I_gotta_rock

    Fern

    From the album: Carbondale, PA

    Carbondale, PA Lewellyn Formation Pennsylvanian period 299-323 myo
  23. I_gotta_rock

    Leaf Impression

    From the album: Carbondale, PA

    Carbondale, PA Lewellyn Formation Pennsylvanian period 299-323 myo
  24. I_gotta_rock

    Leaf Impressions

    From the album: Carbondale, PA

    Carbondale, PA Lewellyn Formation Pennsylvanian period 299-323 myo
  25. I_gotta_rock

    Calamities bark

    From the album: Carbondale, PA

    Calamities sp., a bamboo-like plant closely related to modern horsetails with hollow, woody stem that grew more than 100 ft high (30m). Carbondale, PA Lewellyn Formation Pennsylvanian period 299-323 myo
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