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  1. While staying in North Texas I made stops to a couple local creeks such as Fossil Creek in Fort Worth. I've been trying to narrow down the identification of some ammonites and other things but despite the popularity and attention the creek receives I have had a difficult time determining what formations outcrop in the specific area. It's complicated by the fact that I'm not used to the stratigraphic characteristics of the formation of the area. I strongly suspect most of my fossils to have come from the Weno based on stratigraphic descriptions. However, I have read one source that leaves the W
  2. Missourian

    Backyard Trip

    My folks have a nice lake behind their house. It is relaxing to spend a warm evening watching a heron spear fish or geese fight each other. Or watch silt slowly fill the lake bed. Across the street, a housing developer stripped off a bunch of soil down to the bedrock, but ran out of money before building on the land. This has resulted in some significant erosion and sedimentation in the lake, but this cloud does have a silver lining. I soon noticed a thick bed of shale exposed on the hill. So it was only a matter of time until I make the short trip to the top. The hill,
  3. @Scylla was nice enough to send me these two Hindia specimens from the PCS Quarry in Schoharie NY. But we're not clear of the geology. Apparently more than one formation is exposed there. Does anyone know if the formation/age can be narrowed down at all, based on the taxon and location? Also, is the granular texture (esp. the one on the right) indicative of spicules? The one on the left has a depression, as if it were a spherical vase shape with an opening at the top. Is this what Hindia would have looked like in life? The other one has no clear depression, and I wonder why.
  4. doushantuo

    cycle of manmade materials

    (The "Great Pacific Garbage Patch" is mentioned,BTW) The geological cycle of plastics and their use as a stratigraphic indicator of the Anthropocene Jan Zalasiewicz, Colin N. Waters, Juliana A. Ivar do Sul, Patricia L. Corcoran, Anthony D. Barnosky, Alejandro Cearreta, Matt Edgeworth, Agnieszka Gałuszka, Catherine Jeandel, Reinhold Leinfelder, J.R. McNeill, Will Steffenl Colin Summerhayes, Michael Wagreich, Mark Williams, Alexander P. Wolfe, Yasmin Yonan Anthropocene 13 (2016) 4–17 size,approx. 3,8 mB 817561320_zalasPlasticsAnthropocene.pdf
  5. doushantuo

    Hell Creek stratigraphy

    The Hell Creek Formation, Montana: A Stratigraphic Review and Revision Based on a Sequence Stratigraphic Approach Denver Fowler Geosciences 2020, 10(11), 435; https://doi.org/10.3390/geosciences10110435 LINK size:approx. 36 mB
  6. FORMATION BINNING: A NEW METHOD FOR INCREASED TEMPORAL RESOLUTION IN REGIONAL STUDIES, APPLIED TO THE LATE CRETACEOUS DINOSAUR FOSSIL RECORD OF NORTH AMERICA by CHRISTOPHER D. DEAN , A. ALESSANDRO CHIARENZA and SUSANNAH C. R. MAIDMENT [Palaeontology, 2020, pp. 1–21] pala.12492.pdf
  7. sarracenia

    Learning our Local Limestone

    Hi all y'all. I'm curious about learning more about our local geography to learn more about the context for fossils I find around here. I know a little bit, but not a ton and I'd love to learn more. I think I should probably start with what's exposed at the surface at my house. We're in the Balcones Fault Zone, and I've seen this spot mapped as both undifferentiated Fredricksburg Group and as Edwards Group. We've got a little intermittent creek with a deep enough valley/canyon that there's probably a 50' elevation difference between the highest and lowest areas. Being
  8. doushantuo

    The Jurassic of Europe

    PDF BIOSTRATIGRAPHIE DU JURASSIQUE OUEST-EUROPÉEN ET MÉDITERRANÉEN Zonations parallèles et distribution des invertébrés et microfossiles Elie CARIOU & Pierre HANTZPERGUE memoire 17 Elf exploration & Production @Coco @michele 1937 @fifbrindacier typologie:ouvrage synthetique,et:utile,probablement edit: pour probablement,lire: peut etre Useful stratigraphic information in this one edit 2: ca. 31 MB,alors:large
  9. a slight caveat: the piece is from 2005 supplementary(and included): reasonably large character/taxon matrix Paleobiology, 31(3), 2005, pp. 400–423 Integrating ichnofossil and body fossil records to estimate locomotor posture and spatiotemporal distribution of early sauropod dinosaurs: a stratocladistic approach Jeffrey A. Wilson wilsondinosaurop{ichnolstratocladisphenet+.pdf
  10. NOhlMunneck Reconstructing time and diagenesis of limestone-marl alternations from the selective compaction of colonies of the tabulate coral Halysites Theresa Nohl & Axel Munnecke Bulletin of Geosciences 94(3), 279–298 size:about 21 MB recommended
  11. Hello, I am searching for geologic time dates for some formations. Most are named in the 1800's, so the names may make no sense. Europe Maybe France? carboniferous limestone of borlton, County of La Couronne Ireland, Lower Carboniferous Limestone, Ireland Calc carbonif Armagh? Formation and locality: Mountain Limestone, Armagh England, Ticknall Formation, Mississippian, Ticknall, South Derbyshire, England carboniferous limestone around Bristol Carboniferous Limestone: Oreton, Shropshir
  12. Troodon

    The 2020 Geologic Timescale

    The 2020 Geologic Timescale from stratigraphy.org is out: http://stratigraphy.org/index.php/ics-chart-timescale
  13. I've just purchased a fine slab of belemnites from Holzmaden and the stratigraphy is given as Posidonienschifer, Lias epsilon II-102. I know that epsilon is Lower Toarcian but please could anyone enlighten me about the II-102? I particularly want to correlate this accurately with Yorkshire, if possible! @belemniten ? EDIT: I've just checked the seller's other material and one that I'd expect to be from the same beds is given as "II-12" - so @oilshale is almost certainly right with his answer below, and it see
  14. doushantuo

    correlation-reptiles cephalopods

    45437447.pdf Netherlands Journal of Geosciences — Geologie en Mijnbouw | 84 – 3 | 283 - 301 | 2005 Stratigraphic ranges of mosasaurs in Belgium and the Netherlands (Late Cretaceous) and cephalopod-based correlations with North America J.W.M. Jagt
  15. As they said in school the only dumb question is the unasked one. So here goes... Instead of wasting field time fumbling around trying to figure this out, could someone please tell me how to read these sorts of section descriptions? Is the top of the printed list the top of the rock layer or the bottom?
  16. I made my first trip to the massive Ordovician roadcut near St. Leon IN yesterday. Had a good time. One question I had was about the different formations present there. If I understand correctly, most of the Richmond Group is exposed there, and bottom to top is the Waynesville, Liberty, and Whitewater formations. I really couldn't make out any clear divisions in the exposed rock though. From what I've read, the butter shale trilobite layer is the Liberty formation. I spent most of my time collecting on the second terrace, which appeared to be made at the top of the butter shale layer. So that
  17. What Fossils Alone Can’t Explain About Dinosaurs When time is measured in 10-million-year blocks, the lines between ecosystems and animals that would never have coexisted can get blurry. Laura Poppick, The Atlantic, August 17, 2019 https://www.theatlantic.com/science/archive/2019/08/paleontology-precision-problem/596176/ Yours, Paul H.
  18. link Martino, R. L., 2004, Sequence stratigraphy of the Glenshaw Formation(middle– late Pennsylvanian) in the central Appalachian basin, in :J. C. Pashin and R. A. Gastaldo, eds., Sequence stratigraphy,paleoclimate, and tectonics of coal-bearing strata: AAPG Studies in Geology 51, p. 1–28. size: about 6 Mb the emphasis is on sequence stratigraphy and (correlation of)paleosols: the need for a background of knowledge of these subjects lies in the gray area between "absolutely necessary" and "comes in handy"
  19. Another snow storm has swept through here so how about we take a trip to Southern Utah in mid-June. I will be straightforward with you, I didn’t get many fossils from this trip but if you would like to hear my tale of woe read on! Let’s start out with the stratigraphy column. You’ll notice most of it is red. If you’ve read some of my other trip reports you’ll probably know what that means, no fossils to report from this area. My structural geologist buddies had a blast, though, so beware a lot structural and sedimentary geology ahead. I’ll save talking about the Wahwe
  20. doushantuo

    conodont stratophenetics

    THE CHRONOPHYLETIC APPROACH:STRATOPHENETICS FACING AN INCOMPLETE FOSSIL RECORD by JERZY DZIK [Special Papers in Palaeontology, 73, 2005, pp. 159–183]
  21. The Amateur Paleontologist

    Fairly recent bit of opal fossil research

    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 spec
  22. doushantuo

    Pamunkey stratigraphy and Mollusca

    WARD Lauck W.Ward Stratigraphy and Characteristic Mollusca of the Pamunkey Group(Lower Tertiary) and the Old Church Formation of the Chesapeake Group,Virginia Coastal Plain United States Geological Survey Professional paper 1346 About 25 MB As such things go:detailed!!!
  23. doushantuo

    stormy weather

    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
  24. 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.
  25. 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 edg
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