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Showing results for tags 'stratigraphy'.
Found 51 results
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Fairly recent bit of opal fossil research
The Amateur Paleontologist posted a topic in General Fossil Discussion
After learning about Weewarrasaurus, I thought it'd be nice to report the 'lesser-known' recent bit of research about the opalised fossil site Lightning Ridge (New South Wales, Australia) It's basically the most up-to-date paper dealing with the geology - including age, stratigraphy and lithology - and vertebrate paleontology. The paper provides many new details about the Griman Creek Formation (GCF), a Cenomanian (mid-Cretaceous) formation which crops out in the area around Lightning Ridge. The GCF is a formation especially known for its diverse vertebrate paleo-ecosystem; of which many species are represented by quite a few opalised fossils The paper is also rather neat as it contains a nice overview of all the vertebrate groups represented at the GCF - an overview complete with a comprehensive (and up-to-date) list of vertebrate taxa, and several nice pictures of opalised vertebrate fossils Finally, the paper also indicates that a new ornithopod genus (Fostoria) from the GCF is soon going to be published Bell, P. R., Fanti, F., Hart, L. J., Milan, L. A., Craven, S. J., Brougham, T., & Smith, E. (2018). Revised geology, age, and vertebrate diversity of the dinosaur-bearing Griman Creek Formation (Cenomanian), Lightning Ridge, New South Wales, Australia. Palaeogeography, Palaeoclimatology, Palaeoecology. Abstract: The mid-Cretaceous Griman Creek Formation (GCF), which crops out near the town of Lightning Ridge in the Surat Basin of north-central New South Wales, Australia, is noteworthy for its opalised vertebrate fauna. The fossil assemblage comprises remains of aspidorhynchid teleosts, lamniform chondrichthyans, dipnoans, chelid and possible meiolaniform turtles, leptocleidid-like and possible elasmosaurid plesiosaurians, anhanguerian pterosaurs, titanosauriform sauropods, megaraptoran theropods, ankylosaurians, several forms of non-iguano- dontian and iguanodontian ornithopods, crocodylomorphs, enantiornithine birds, and stem and true mono- tremes, making it one of the most diverse mid-Cretaceous terrestrial vertebrate faunas in Australia. A detailed stratigraphic survey of twenty subterranean opal mines provides new information on the geology, age and pa- laeoenvironment of the main fossil-bearing beds. Vertebrate remains derive from the ‘Finch Clay facies’, lat- erally-extensive but discontinuous lenses of claystone that likely accumulated relatively rapidly in near-coastal but freshwater embayments (i.e. lagoonal conditions), and probably represent a single, roughly con- temporaneous fauna. U-Pb age dating of detrital zircons extracted from a distinct layer of volcanogenic claystone immediately overlying one of the opalised fossil-bearing layers yields a maximum depositional age of 100.2–96.6 Ma. These new dates confirm an early to mid-Cenomanian age for the fauna, rather than Albian, as has been reported previously. The GCF at Lightning Ridge is therefore equivalent to the middle part of the Winton Formation (Queensland) and several million years older than the sauropod-dominated fauna at Winton. For those who want the paper, PM me your email address and I'll send it to you -Christian -
here Nat. Hazards Earth Syst. Sci., 15, 1181–1199, 2015 www.nat-hazards-earth-syst-sci.net/15/1181/2015/ doi:10.5194/nhess-15-1181-2015 © Author(s) 2015. CC Attribution 3.0 License. Internal structure of event layers preserved on the Andaman Sea continental shelf, Thailand: tsunami vs. storm and flash-flood deposits D. Sakuna-Schwartz1,* , P. Feldens1 , K. Schwarzer1 , S. Khokiattiwong2 , and K. Stattegger edit< about 4.8MB
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Cretaceous Stratigraphy and Paleontology of West-Central Alabama - Guidebook
Oxytropidoceras posted a topic in Fossil News
David C. Kopaska-Merkel and others, 2016, Cretaceous Stratigraphy and Paleontology of West-Central Alabama: A guidebook. Black Belt Museum. https://www.researchgate.net/publication/312232486_CRETACEOUS_STRATIGRAPHY_AND_PALEONTOLOGY_OF_WEST-CENTRAL_ALABAMA_A_GUIDEBOOK Yours, Paul H.-
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- cretaceous
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Any ichnofossil specialist in there? Ichnofossil from Brazil Jurassic ID
Aerson posted a topic in Fossil ID
Hello everyone. I'm a geologist/stratigraphist and I've been studying Missão Velha Formation (Araripe Basin, Brazil Jurassic-Cretaceous) for a couple of years. We found some structures that seem to be trace fossils, but as geologists, we assume ourselves to be slightly ignorant in ecologic behavior of species. The MV Formation are corsed sandstones, well stratified, with few purple siltic-sandstone levels with ped structures. These trace fossils I'll be presenting next resemble the top of one of these siltic-sandstone levels. They are tridimensional and cilindric, with an spheric edge on the bottom and the top is not well seen. It have sort of a stratification, like it was many piled up rings. -
a recognized classic Indispensable! Worsley,Aarhus et al:The Silurian Succession of the Oslo Region NGU Bull.384,1983 ABOuT 7,5 MB NB: NO fossils are figured,the emphasis is on local correlation and stratigraphy
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link This being: Stratigraphy and Fossil Plants from the Cutler Formation (Late Paleozoic) and their Paleoclimatic Implications, Eastern Paradox Basin, Colorado Kendall R. Grazul , Jacqueline E. Huntoon , and Jennifer M.K. O’Keefe from: GEOLOGY OF THE INTERMOUNTAIN WEST NO taxonomy,short review of the paleo-enviroment and the stratigraphy,several taxa illustrated NB: there is a "screen-optimized version",and this is NOT it 6,81 Mb
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- paleobotany
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From the album Calvert Cliffs
This view of the cliffs in Calvert County, Maryland is gorgeous. I don't often see quite the vivid color range in this formation. I didn't linger, though, and I was wading in the bay to keep my distance. See those trees at the top of the 40 ft +/- cliff? The ones with the roots hanging over the edge? Those aren't going to be at the top of the cliff for long. At this point, they are probably only still there out of sheer habit. We did her a landslide the night we arrived, the spoils of which are in some of the following images in this album. I was on a trip earlier in the year, at a different part of the cliffs, when someone did get hit in the head by a bit of falling clay. Lucky for her, it wasn't a big chunk or from very high up. She *only* had a concussion. If ever you are close to the cliffs like this, watch and listen to where you are at all times. Run like crazy if you hear anything falling! DO NOT TOUCH THE CLIFFS! DO NOT STAND ON THE TOP EDGE OF THE CLIFFS! That prize Meg tooth isn't worth your life. -
The latest version of the International Chronostratigraphic Chart/Geologic Time Scale is now available! (v 2018/07), which contains significant updates to the Quaternary and Cambrian System, is now formally released. Download available in link New Holocene subdivisions: Greenlandian (11,700 yr b2k) Northgrippian (8326 yr b2k) Meghalayan (4200 yr before 1950) http://www.stratigraphy.org/index.php/ics-news-and-meetings/120-ics-chart-containing-the-quaternary-gssps-and-new-stages-v-2018-07-is-now-released
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- geologic time scale
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here(lessthan 5 Mb) The Cedar Valley/Lime Creek piece by some noted experts would seem to steal the show. Fig 3, with its correlation chart. (useful inclusion of a Vail Transgressive/Regressive cycle chart!!!!) Figure gets better and more useful each time I look at it.
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- iowa
- stratigraphy
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QUAT glacai The Scheldt estuary trawl crowd might find this useful,perhaps About 5-10 mB each,source: JGSL,jan 2018 issue
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Scientifically Significant Fossils Vanish, Masol, Siwalik Frontal Range, Punjab, India
Oxytropidoceras posted a topic in Fossil News
Scientifically vital fossils vanish, Masol’s claim to fame in danger Siddarth Banerjee | TNN | April 30, 2018 https://timesofindia.indiatimes.com/city/chandigarh/scientifically-vital-fossils-vanish-masols-claim-to-fame-in-danger/articleshow/63969904.cms 2.6-million-year-old ‘priceless’ fossil on sale for just Rs 4500 Sidharth Banerjee | TNN | July 24, 2017 https://timesofindia.indiatimes.com/india/2-6-million-year-old-priceless-fossil-on-sale-for-just-rs-4500/articleshow/59729760.cms Some papers are: Chapon-Sao, C., Abdessadok, S., Tudryn, A., Malassé, A.D., Singh, M., Karir, B., Gaillard, C., Moigne, A.M., Gargani, J. and Bhardwaj, V., 2016. Lithostratigraphy of Masol paleonto-archeological localities in the Quranwala Zone, 2.6 Ma, northwestern India. Comptes Rendus Palevol, 15(3-4), pp. 417-439. https://hal.archives-ouvertes.fr/hal-01323986/ Malassé, A.D., Moigne, A.M., Singh, M., Calligaro, T., Karir, B., Gaillard, C., Kaur, A., Bhardwaj, V., Pal, S., Abdessadok, S. and Sao, C.C., 2016. Intentional cut marks on bovid from the Quranwala zone, 2.6 Ma, Siwalik Frontal Range, northwestern India. Comptes Rendus Palevol, 15(3-4), pp. 317-339. https://www.researchgate.net/publication/292209224_Intentional_cut_marks_on_bovid_from_the_Quranwala_zone_26_Ma_Siwalik_Frontal_Range_northwestern_India https://www.researchgate.net/profile/Anne_Dambricourt_Malasse Malassé, A.D., Singh, M., Karir, B., Gaillard, C., Bhardwaj, V., Moigne, A.M., Abdessadok, S., Sao, C.C., Gargani, J., Tudryn, A. and Calligaro, T., 2016. Anthropic activities in the fossiliferous Quranwala Zone, 2.6 Ma, Siwaliks of Northwest India, historical context of the discovery and scientific investigations. Comptes Rendus Palevol, 15(3-4), pp.295-316. https://www.researchgate.net/publication/292077679_Anthropic_activities_in_the_fossiliferous_Quranwala_Zone_26Ma_Siwaliks_of_Northwest_India_historical_context_of_the_discovery_and_scientific_investigations https://www.researchgate.net/profile/Anne_Dambricourt_Malasse Gargani, J., Abdessadok, S., Tudryn, A., Sao, C.C., Malassé, A.D., Gaillard, C., Moigne, A.M., Singh, M., Bhardwaj, V. and Karir, B., 2016. Geology and geomorphology of Masol paleonto-archeological site, Late Pliocene, Chandigarh, Siwalik Frontal Range, NW India. Comptes Rendus Palevol, 15(3-4), pp.379-391. https://www.researchgate.net/publication/281291986_Geology_and_Geomorphology_of_Masol_paleonto-archeological_site_Late_Pliocene_Chandigarh_Siwalik_Frontal_Range_NW_India https://www.researchgate.net/profile/Anne_Dambricourt_Malasse Gaillard, C., Singh, M., Malassé, A.D., Bhardwaj, V., Karir, B., Kaur, A., Pal, S., Moigne, A.M., Sao, C.C., Abdessadok, S. and Gargani, J., 2016. The lithic industries on the fossiliferous outcrops of the Late Pliocene masol formation, Siwalik frontal range, northwestern India (Punjab). Comptes Rendus Palevol, 15(3-4), pp.341-357. https://www.researchgate.net/publication/293332452_The_lithic_industries_on_the_fossiliferous_outcrops_of_the_Late_Pliocene_Masol_Formation_Siwalik_Frontal_Range_north-western_India_Punjab https://www.researchgate.net/profile/Claire_Gaillard2 Yours, Paul H.- 3 replies
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- paleoanthropology
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Pliensbachian.pdf less than 2 Mb
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CAROLI 8.6 Mb Thesis by Crane,lemon,basket etc Area:Elizabethtown
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- vertebrates
- bladen
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DavMoly size:about 6,5 Mb B(ritish)G(eological)S(urvey)!! Lovely 3d images of some marker chitinozoa Mouthwatering,and nothing less. Thoroughly recommended NB I've never seen an uglier landscape than that of Wales editorial note:its content is not dissimilar to(below)
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- silurian
- united kingdom
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I came across this today. I thought I’d share it on here. ChronostratChart2017-02.pdf Not that the charts differ significantly from year to year, but I liked this link because it has quite a bit of info all in one place. It might be more useful for those who are academically and research inclined. They also have it available in many different languages for those who do not have English as their first language. For those of you who collect in the Ordovician, they have a very nice detailed chart at the link below. Ordovician Chronostratigraphic Chart http://stratigraphy.org/index.php/ics-chart-timescale
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- geological tables
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excel data sheets/charts NOT included denverfowlPLOSusamaastriccorrelgeochronoljournal.pone.0188426.pdf Intriguing: " Rapid stepwise acquisition of display characters in many dinosaur clades, in particular chasmosaurine ceratopsids, suggests that they may be useful for high resolution biostratigraphy."
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EHRET_al-2012-Palaeontology.pdf
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- elasmobranch
- pisces
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for those with catholic tastes in stratigraphy Do NOT expect pictorial exuberancy,it's more of a tabulation of lithologies and their stratigraphic interpretation than anything else
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GSAILL raison d' etre for this post : -classic locality -an in-depth analysis -I might be wrong,but for those who collect at/near/in this area,there's a lot of useful information in this thesis VERY NICE WHEELER DIAGRAM
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The Anthropocene, Australian Broadcasting Corporation
Oxytropidoceras posted a topic in Fossils On The Web
The Anthropocene, the New Age of Humans Catalyst, Australian Broadcasting Corporation http://www.abc.net.au/catalyst/stories/4574615.htm More videos - Archaeology & History http://www.abc.net.au/catalyst/stories/by-topic/ARCHAEOLOGY&HISTORY.htm More videos - fossils http://www.abc.net.au/catalyst/stories/by-topic/FOSSILS.htm Yours, Paul h. -
excellent analysis of basin fill geometry(read it coupla months back,BTW,but in this case I trust my memory) schlisolsen_90_sm.pdf do not open if allergic to rigorous quantitative analysis
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Stratigraphy of the Late Cretaceous North America
Troodon posted a topic in General Fossil Discussion
Placement of terrestrial formations in the late cretaceous of North America as been constantly evolving and in October 2016 Denver Fowler a Paleontologist at the Museum of the Rockies published a very extensive paper on the subject and updated most units. This is very important when it comes to understanding dinosaur evolution and aids in describing species. This paper is in the process of going through peer review so is subject to change. Fowler DW. (2016) A new correlation of the Cretaceous formations of the Western Interior of the United States, I: Santonian-Maastrichtian formations and dinosaur biostratigraphy. PeerJ Preprints 4:e2554v1https://doi.org/10.7287/peerj.preprints.2554v1 The paper is pretty technical but all of the data is found in this excel file (supplemental information) which is a massive high-resolution stratigraphic chart for all of the formations from the late cretaceous of North America. It's nice to see it all laid out and a great reference source. https://doi.org/10.7287/peerj.preprints.2554v1/supp-1 To make it easy I've broken the chart apart so you can easily see most important dinosaur formations Texas The biggest change came with our understanding the Aguja and Javelina Formations of Texas part of the Tornillo group. The study indicated that the Aguja Formation deposits are only Campanian in age and that the Javelina Formation does not extend into the end of the Cretaceous. Very important when trying to describe species in those formations. Sellers have been comparing the Aguja to the Judith River in Montana well there is a correlation but its deposits are much younger that JR. Eastern Montana, N. Dakota, S. Dakota and Wyoming What I found interesting is that the Hell Creek is much older in Montana than in the adjacent states. The other interesting observation that can been easily be seen on these charts is that the how short a time frame the deposits of the Hell Creek/Lance formation are compared to the other major dinosaur formations. Central Montana Two Medicine and Judith River Formations are the two key formations in this locality Utah and New Mexico Utah depicted on the left and NM on the right Head North to Canada Alberta and Saskatchewan- 11 replies
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- western interior
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CREEK Given the interest in that location...
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HAHA THIS PIECE IS NO LAUGHING MATTER!!!!! I consider it indispensible..
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a classical area!! Fauna:mostly archaeocyatha & trilobita GORGER
