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Showing results for tags 'silurian'.
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From the album: Invertebrates
Graptolites non det. Silurian Vogtland Saxony Germany -
From the album: Invertebrates
Graptolites non det. Silurian Vogtland Saxony Germany -
From the album: Invertebrates
Graptolite non det. Silurian Vogtland Saxony Germany -
From the album: Invertebrates
Graptolite non det "Pneumatocyst" Silurian Altmannsgrün Saxonia Germany The pneumatocyst was interpreted by Ruedemann, 1895 as a flotation device and indication of a planktic life style of the graptolites. -
Visiting some of the oldest fossils of Styria, Austria (Silurian orthocerids and brachiopods)
FranzBernhard posted a topic in Fossil Hunting Trips
Very small outcrops northwest of Graz are perhaps the richest site of Silurian fossils in Styria. There may be other sites with somewhat older macrofossils in Styria, but not as rich. The outcrops are part of the Palaeozoic of Graz, a thrust sheet within the Eastern Alps, composed or Silurian to Pennsylvanian sediments. It consists of three separate nappes, the outcrop and fossils presented here belong to the Eggenfeld-member of the Kötschberg-formation within the Rannach nappe. Geological map of Styria with the Palaeozoic of Graz situated north of Graz. The red X is the location of the fossil site. Geological and structural map of the Palaeozoic of Graz. Note that the colors of the Rannach facies and Hochlantsch facies have been accidentally interchanged, the red X is the location of the fossil site. From Gasser et al. (2009). Stratigraphy and facies distribution of the Palaeozoic of Graz. Kötschberg-formation is Nr. 10 (red X), thicknesses of formations are not to scale. From Gasser et al. (2009). The age of the Eggenfeld-member is, based on conodont data, upper Silurian (Ludlow, Pridoli) to lowermost Devonian (Lochkovian). What´s special about this site is the abundance of orthocerids in some only a few dm thick layers of grey to brown dolomite and dolomitic limestone that are intercalated with tuffitic rocks. And also somewhat special is the number of papers dealing with these very small and poor outcrops. The occurrence of orthocerids is known since the 1950ies, a good up-to-date (2010) summary is this paper, it mentions 16(!) nautiloid taxa, most of them orthocerids. Its in English and includes pics of fossils and a stratigraphic section: GPZ_Eggenfeld_Histon_2010.pdf These are the seven nautiloid genera figured in this paper, no species assignment was made.
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- austria
- brachiopods
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Question about the division between time periods. Ordovician vs. Silurian
Recker posted a topic in Questions & Answers
I have a question about the different time periods, I live in Southeast Indiana, Whitewater river area, within the Cincinnati region and Ordovician period. Having a hard time understanding this, will I only find Ordovician period fossils or could I find later period fossils like Silurian fossils? And why? You all have been so helpful and I appreciate it. Linda -
Paper describing A. pogsoni - https://www.researchgate.net/publication/236011643_Early_Silurian_Llandovery_trilobites_from_the_Cotton_Formation_near_Forbes_New_South_Wales_Australia
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- aulacopleura
- aulacopleura pogsoni
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From the album: Invertebrates and plants(& misc.)
Eurypturus lacustris arthropoda chelicerata bertie Gr. Williamsville (A) Fm Buffalo, Western New York silurian -
Baltoeurypterus tetragonophtalmus (Fischer, 1839)
oilshale posted a gallery image in Member Collections
From the album: Invertebrates
Baltoeurypterus tetragonophthalmus (Fischer 1839) Silurian Smotrych River Kamianets-Podilskyi Ukraine -
From the album: Invertebrates
Aulacopleura koninckii (Barrande, 1846) Silurian Wenlock Lodenice Liten Formation Motol Member Monograptus flexilis-Zone Czech Republic Hughes, N.C., Hong, P.S., Hou, J.B., & Fusco, G. (2017) The development of the Silurian trilobite Aulacopleura koninckii reconstructed by applying Inferred growth and segmentation dynamics: A case study in Paleo-Evo-Devo. Frontiers in Ecology and Evolution, 5(37):1-12 OPEN ACCESS PDF -
From the album: Trilobites
Rochester Shale Formation Middleport, New York, USA© 2018 by Jay A. Wollin
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From the album: Northern's inverts
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From the album: Northern's inverts
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From the album: Trilobites
Cranidium.-
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- czech republic
- odontopleurid
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From the album: Trilobites
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From the album: MY FOSSIL Collection - Dpaul7
Acantholomina minuta Silurian Trilobite SITE LOCATION: Kopaninské formation, Kosov near Beroun, Czech Republic TIME PERIOD: Silurian (about 420 million years) Data: Odontopleurida is an order of very spinose trilobites closely related to the trilobites of the order Lichida. Some experts group the Odontopleurid families, Odontopleuridae and Damesellidae, within Lichida. Odontopleurids tend to have convex, bar-shaped cephalons, and lobed, knob-shaped glabella that extend to, or almost to the anterior margin. Many, if not almost all odontopleurids have long spines that are derived either from the margins of the exoskeleton, or from granular or tubercular ornamentation, or both. Many odontopleurids are so spinose so as to be described as having "spines on (their) spines." Odontopleurids have 8 to 13 thoracic segments, with Odontopleuridae odontopleurids having no more than 10, and Damesellidae odontopleurids having no more than 13. The pygidium tends to be very small, and invariably has long spines emanating from it in all known genera. Genera of Damesellidae are restricted to Middle to Upper Cambrian marine strata, and may represent a transition between Cambrian-aged lichids, and odontopleurids of Odontopleuridae. The odontopleurids of Odontopleuridae first appear in the Upper Cambrian, and go extinct before the end of the Frasnian epoch of the late Devonian. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Odontopleurida Family: †Odontopleuridae Genus: †Acanthalomina Species: †minuta -
From the album: MY FOSSIL Collection - Dpaul7
Acantholomina minuta Silurian Trilobite SITE LOCATION: Kopaninské formation, Kosov near Beroun, Czech Republic TIME PERIOD: Silurian (about 420 million years) Data: Odontopleurida is an order of very spinose trilobites closely related to the trilobites of the order Lichida. Some experts group the Odontopleurid families, Odontopleuridae and Damesellidae, within Lichida. Odontopleurids tend to have convex, bar-shaped cephalons, and lobed, knob-shaped glabella that extend to, or almost to the anterior margin. Many, if not almost all odontopleurids have long spines that are derived either from the margins of the exoskeleton, or from granular or tubercular ornamentation, or both. Many odontopleurids are so spinose so as to be described as having "spines on (their) spines." Odontopleurids have 8 to 13 thoracic segments, with Odontopleuridae odontopleurids having no more than 10, and Damesellidae odontopleurids having no more than 13. The pygidium tends to be very small, and invariably has long spines emanating from it in all known genera. Genera of Damesellidae are restricted to Middle to Upper Cambrian marine strata, and may represent a transition between Cambrian-aged lichids, and odontopleurids of Odontopleuridae. The odontopleurids of Odontopleuridae first appear in the Upper Cambrian, and go extinct before the end of the Frasnian epoch of the late Devonian. Kingdom: Animalia Phylum: Arthropoda Class: †Trilobita Order: †Odontopleurida Family: †Odontopleuridae Genus: †Acanthalomina Species: †minuta -
From the album: Fossils from Arisaig Nova Scotia
The scyphocrinus were floating crinoids and their holdfast was actually an air bladder that supported multiple stems and calyx. -
From the album: Fossils from Arisaig Nova Scotia
Lovely shell carpet of brachiopods, Silurian. Nova Scotia. -
From the album: Fossils from Arisaig Nova Scotia
Brachiopod shell carpet on a cliff side, Silurian. -
From the album: MY FOSSIL Collection - Dpaul7
Emmonsia Coral, a Colony Coral SITE LOCATION: Beachriver Formation of the Brownsport Formation along Hwy. 641 in Decatur Co., Tennessee TIME PERIOD: Silurian Period (ca 430 mission years old) Favositida is an extinct suborder of prehistoric corals in the order Tabulata. The tabulate corals, forming the order Tabulata, are an extinct form of coral. They are almost always colonial, forming colonies of individual hexagonal cells known as corallites defined by a skeleton of calcite, similar in appearance to a honeycomb. Adjacent cells are joined by small pores. Their distinguishing feature is their well-developed horizontal internal partitions (tabulae) within each cell, but reduced or absent vertical internal partitions (septae). They are usually smaller than rugose corals, but vary considerably in shape, from flat to conical to spherical. Around 300 species have been described. Among the most common tabulate corals in the fossil record are Aulopora, Favosites, Halysites, Heliolites, Pleurodictyum, Sarcinula and Syringopora. Tabulate corals with massive skeletons often contain endobiotic symbionts, such as cornulitids and Chaetosalpinx. Like rugose corals, they lived entirely during the Paleozoic, being found from the Ordovician to the Permian. With Stromatoporoidea and rugose corals, the tabulate corals are characteristic of the shallow waters of the Silurian and Devonian. Sea levels rose in the Devonian, and tabulate corals became much less common. They finally became extinct in the Permian–Triassic extinction event. Kingdom: Animalia Phylum: Cnidaria Class: Anthozoa Order: †Tabulata Family: †Favositidae Genus: †Emmonsia -
From the album: MY FOSSIL Collection - Dpaul7
Emmonsia Coral, a Colony Coral SITE LOCATION: Beachriver Formation of the Brownsport Formation along Hwy. 641 in Decatur Co., Tennessee TIME PERIOD: Silurian Period (ca 430 mission years old) Favositida is an extinct suborder of prehistoric corals in the order Tabulata. The tabulate corals, forming the order Tabulata, are an extinct form of coral. They are almost always colonial, forming colonies of individual hexagonal cells known as corallites defined by a skeleton of calcite, similar in appearance to a honeycomb. Adjacent cells are joined by small pores. Their distinguishing feature is their well-developed horizontal internal partitions (tabulae) within each cell, but reduced or absent vertical internal partitions (septae). They are usually smaller than rugose corals, but vary considerably in shape, from flat to conical to spherical. Around 300 species have been described. Among the most common tabulate corals in the fossil record are Aulopora, Favosites, Halysites, Heliolites, Pleurodictyum, Sarcinula and Syringopora. Tabulate corals with massive skeletons often contain endobiotic symbionts, such as cornulitids and Chaetosalpinx. Like rugose corals, they lived entirely during the Paleozoic, being found from the Ordovician to the Permian. With Stromatoporoidea and rugose corals, the tabulate corals are characteristic of the shallow waters of the Silurian and Devonian. Sea levels rose in the Devonian, and tabulate corals became much less common. They finally became extinct in the Permian–Triassic extinction event. Kingdom: Animalia Phylum: Cnidaria Class: Anthozoa Order: †Tabulata Family: †Favositidae Genus: †Emmonsia-
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- beachriver formation
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One of a number of spiral monograptids from this period and a zone species, these have all been referred to Monograptus at various times as well as separate genera based on rhabdosome form which may not be of significant importance. It is bisected by an unidentified straight Monograptus. Reference for ID (as Monograptus spiralis): Elles & Wood 1901-1918, Monograph on British Graptolites, Pal. Soc. Monograph 33. (Plate XLVIII, fig. 7). Now generally referred to Oktavites Levina, 1928, e.g. in J. A. Zalasiewicz, L. Taylor et al 2009, Graptolites in British Stratigraphy, Geol Mag. 146, pp. 785-850. And here: http://fossiilid.info/9458
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- graptolite
- llandovery
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From the album: Eurypterid Fossils
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- bertie waterlime
- eurypterus remipes
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From the album: Eurypterid Fossils
5-6 cm transverse. Moistened and digital image tweaked to increase detail.-
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- coxa
- eurypterid
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