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Found 208 results

  1. Paleozoic algal matting?

    While hiking through a desert area just southwest of Tucson, AZ. I found these interesting layered rocks. Over the course of an afternoon I came across a couple more spots where these types rocks were strewn over relatively large areas. Many of the pieces would fit inside a square inch or the palm of your hand, while many others were a few feet long/wide. I showed these to a local geologist and he called them stromatolithic Paleozoic limestone – evidence the area was once covered by water and these represent the layers of algae, probably in the form of algal matting that existed there, dating back to the Paleozoic time period. Respectfully, can anyone confirm or negate this idea? Thank you for your time and consideration!
  2. We split open this rock yesterday and it has a mirror image of two things I am not sure of. #1 I see some shell... #2 Vegetation?
  3. Niagara Escarpment

    Today I am up loading a favourite fossil oof mine, I like it because of the calcite quartz geode in what appears to be a brachiopod shell. I live on the Niagara Escarpment. At one time the area was sitting just below the Paleozoicequator, tilted at a more 45 degree angle, in a more east/west direction than the land sits now. This explains the weird road angles to me now, probably formed when the terrain dictated the road directions, but I digress. The Niagara escarpment in Ontario starts at the Niagara Falls, follows along the Lake Ontario Shore, through the cities of St. Catherines, Hamilton, and Dundas, where it takes a sharp turn north in the town of Milton, toward Georgian Bay. It follows along the shoreline of Georgian Bay through Collingwood (The Blue Mountains) across over to Owen Sound, along the shoreline of the west side (where I live) over to the town of Wiarton, up the Bruce Peninsula and carry’s on from there. Having written all that, I need to mention the Ojibwa an Anishinaabe people are the indigenous peoples here, who live with us. I have observed with many of the fossils I find are worn as if the waters were quite turbulent, probably from the heavy tidal action during this time. The moon was much closer to the earth some 430 million years ago, our days were approximately 19 hours long as the earth was spinning faster, and the moon was also spinning. The gravitational forces must have been unbelievable! (Dynamic, biological and anthropology concequences of lunar and angular radii, Steven A Balbus, published 08 August 2014. These are my thoughts today, please let me know what you think.
  4. C scale

    The squamation of “Ctenacanthus” costellatus (Chondrichthyes: Ctenacanthiformes) from the Carboniferous of Lublin area, south-eastern Poland MICHAŁ GINTER and STANISŁAW SKOMPSKI Acta Geologica Polonica, Vol. 69 (2019), No. 4, pp. 571–582 OCCURRENCEs include scales known from specimens from : Carboniferous, Viséan. reported from Scotland (Glencartholm, lower Viséan, two articulated specimens), England (Derbyshire,Ticknall Quarry, Brigantian, one tooth) and Poland @Archie
  5. hogstromhrsloegstroembrigsshunsrucklagerstincsedismachaeridiadevoniarsl1981.full.pdf A pyritized lepidocoleid machaeridian (Annelida)from the Lower Devonian Hunsruck Slate, Germany Anette E. S. Hogstrom, Derek E. G. Briggs, and Christoph Bartels Proc. R. Soc. B (2009) 276, 1981–1986 doi:10.1098/rspb.2008.1875
  6. Identification

    Hello everyone, I working in dimension stone field in Armenia. This fossils where found in a sample small stone block brought for cutting to the factory, then they were machined polished as standard marble or granite tile. The tile (second photo) is 400x800mm app.16x32 inch. Kindly help me to identify these guys. Thanks
  7. What's your take --- are these real? Considering purchase. Details: "Selenopeltis buchii trilobites", 45 x 35 cm (total size), Paleozoic, Upper Ordovician, discovered in Morocco.
  8. Hi everyone, just joined the group. I recently did a kayak trip down the Brazos River Below Possum Kingdom Lake and found some petrified wood. I was wondering if anyone knew of what geologic age and formation it might be from? The surrounding geology seems to be Paleozoic but there is also Pleistocene terraces. Is it possible the wood could have been mineralized in a Pleistocene terrace or is this more likely from a surrounding Paleozoic formation? Thanks in advance for the help.
  9. Stethacanthus altonensis Oklahoma

    From the album Odd and Rare Shark Teeth

    A 340-360 Million year old Stethacanthus tooth from Caney Shale, Oklahoma.
  10. Stethacanthus altonensis Oklahoma

    From the album Odd and Rare Shark Teeth

    A 340-360 Million year old Stethacanthus tooth from Caney Shale, Oklahoma.
  11. Oyster

  12. I have no idea whatsoever

    This is roughly 2 1/2 inch in length. At its widest point 1 1/2 in and a 1/4 in thick. Any help identifying it would be much appreciated
  13. Fossil ID Requested, paleozoic reef

    Here is a limestone reef rock from Tucki Mountain in Death Valley. The strata is vertical. There was a band of reef rock several hundred feet across. Lots of crinoids but it's the sponge / archaeocyathan fossils that I'd like to know about. This is the first time I've done this, so I'm not sure how the answers arrive... Thanks very much! Dick
  14. Here are some color pencil sketches of some Paleozoic agnathans I drew many years ago (maybe 6 or 7 years ago). Time is scarce, but seeing these again I somehow feel inclined to start sketching some new concepts again Polybranchiaspis yunannensis (Galeaspida) Early Devonian Qujing, Yunnan, China Haikouella lanceolata (Agnatha, Haikouellidae) Early Cambrian Chengjiang, Yunnan, China Stensiopelta pustulosa (Cephalaspida) Early Devonian Ternopil, Ukraine Pteraspis (Pteraspiformes) Early Devonian Ternopil, Ukraine
  15. Brantford, Ontario Geology??

    Hey guys, So I discovered there is actually GO transit service from Hamilton, Ontario to Brantford, Ontario and Im actually excited to discover this (HOORAY!!). Does anyone know the geology of the city? Im also looking for papers/files that can help me know what to find there. Thanks for any help!
  16. miscellaneous Moroccan mollusca

    2018_KlugPohle_Amessoui_ISCPP_fieldGuide.pdf The eastern Amessoui Syncline – a hotspot for Silurian to Carboniferous cephalopod research CHRISTIAN KLUG & ALEXANDER POHLE Münster. Forsch.Geol. Paläont. 110 244-260 17 Figs. Münster,March 2018 an excursion guide(More or less),and a nicely illustrated one recommended! (Some ichnites figured as well,amongst which a probable non-trilobitogenic Rusophycus)
  17. ID 3 species in a Permian themed exhibit

    I just went to this traveling exhibit in a museum in a city where my brother lives that it is about the animals and life in the Permian period and I got pictures of 3 fossils, an ammonite, a trilobite and a crinoid but I don’t know what species and genus they are?
  18. chelicerata rossica

    Marshall_et_al-2014-Palaeontology.pdf A DIVERSE CHASMATASPIDID (ARTHROPODA:CHELICERATA) FAUNA FROM THE EARLY DEVONIAN (LOCHKOVIAN) OF SIBERIA by DAVID J. MARSHALL, JAMES C. LAMSDELL, EVGENIY SHPINEV and SIMON J. BRADDY Palaeontology, Vol. 57, Part 3, 2014, pp. 631–655 Key words: Palaeozoic, Chasmataspidida, Heteroaspis, Dvulikiaspis, Nahlyostaspis, Skrytyaspis, convergence. "two novel chasmataspidid species: Nahlyostaspis bergstroemi gen. et sp. nov. and Skrytyaspis andersoni gen. et sp. nov. ‘Eurypterus’ stoermeri and ‘Tylopterella’ menneri are both redescribed as chasmataspidids, having previously been assigned to Eurypterida."
  19. stratigraphic framework of the Glenshaw

    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"
  20. the Serpukhovian unconformity

    Campionserpukmaloofochemistry-_Geophysics-_Geosystems.pdf Constraining the Timing and Amplitude of Early Serpukhovian Glacioeustasy With a Continuous Carbonate Record in Northern Spain Alison Campion , Adam Maloof, Blair Schoene , Sergey Oleynik, Javier Sanz-Lopez , Silvia Blanco-Ferrera , Oscar Merino-Tome , Juan Ramon Bahamonde, and Luis Pedro Fernandez Geochemistry,Geophysics, Geosystems, 19. https://doi. org/10.1029/2017GC007369
  21. Any idea what this is?

    I assume this is a sea lily, but I may be wrong.
  22. I visited a small Paleozoic (Silurian) coral reef in Indiana the other day. No earth-shattering, jaw-dropping discoveries, but it's an interesting spot with dolomitized fossils. Here's a google earth view of the center of the reef. A nice mollusk, if anyone knows what species, let me know. It shattered when I tried to extract it, but I was able to glue it back together as you can see here. Sphaerexochus romingeri cephalon After extraction.. I believe this is a Platyceras: To be continued..
  23. Hey guys do any of you know where I can find Some placoderms here in Black Hawk County Iowa? I have only found a plate piece here and some of my friends found some WHOLE PLACODERMS. while I only have one tiny plate. If you can help me please and thank you!
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