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  1. historianmichael

    Annularia stellata

    From the album: Llewellyn Formation Plants of Pennsylvania

    Annularia stellata Late Pennsylvanian Llewellyn Formation Schuylkill Co., PA
  2. historianmichael

    Annularia stellata

    From the album: Llewellyn Formation Plants of Pennsylvania

    Annularia stellata Late Pennsylvanian Llewellyn Formation Schuylkill Co., PA
  3. historianmichael

    Annularia stellata

    From the album: Llewellyn Formation Plants of Pennsylvania

    Annularia stellata Late Pennsylvanian Llewellyn Formation Schuylkill Co., PA
  4. historianmichael

    Calamites Pith Cast

    From the album: Llewellyn Formation Plants of Pennsylvania

    Calamites Pith Cast Late Pennsylvanian Llewellyn Formation Schuylkill Co., PA
  5. historianmichael

    Calamites Cisti

    From the album: Llewellyn Formation Plants of Pennsylvania

    Calamites cisti Late Pennsylvanian Llewellyn Formation Schuylkill Co., PA
  6. historianmichael

    Calamites cistii

    From the album: Llewellyn Formation Plants of Pennsylvania

    Calamites cistii Late Pennsylvanian Llewellyn Formation Schuylkill Co., PA
  7. historianmichael

    Calamites suckowii

    From the album: Llewellyn Formation Plants of Pennsylvania

    Calamites suckowii Late Pennsylvanian Llewellyn Formation Schuylkill Co., PA
  8. historianmichael

    Stigmaria ficoides

    From the album: Llewellyn Formation Plants of Pennsylvania

    Stigmaria ficoides Rootlets Late Pennsylvanian Llewellyn Formation St. Clair, PA
  9. historianmichael

    Pecopteris sp.

    From the album: Llewellyn Formation Plants of Pennsylvania

    Pecopteris sp. Late Pennsylvanian Llewellyn Formation St. Clair, PA
  10. historianmichael

    Alethopteris valida

    From the album: Llewellyn Formation Plants of Pennsylvania

    Alethopteris valida Late Pennsylvanian Llewellyn Formation St. Clair, PA
  11. historianmichael

    Cyclopteris sp.

    From the album: Llewellyn Formation Plants of Pennsylvania

    Cyclopteris sp. Late Pennsylvanian Llewellyn Formation St. Clair, PA
  12. historianmichael

    Eusphenopteris lobata

    From the album: Llewellyn Formation Plants of Pennsylvania

    Eusphenopteris lobata Late Pennsylvanian Llewellyn Formation St. Clair, PA
  13. historianmichael

    Annularia stellata

    From the album: Llewellyn Formation Plants of Pennsylvania

    Annularia stellata Late Pennsylvanian Llewellyn Formation St. Clair, PA
  14. historianmichael

    Sphenophyllum emarginatum

    From the album: Llewellyn Formation Plants of Pennsylvania

    Sphenophyllum emarginatum and Alethopteris serlii Late Pennsylvanian Llewellyn Formation St. Clair, PA
  15. historianmichael

    Sphenophyllum emarginatum

    From the album: Llewellyn Formation Plants of Pennsylvania

    Sphenophyllum emarginatum and Neuropteris ovata Late Pennsylvanian Llewellyn Formation St. Clair, PA
  16. historianmichael

    Alethopteris serlii

    From the album: Llewellyn Formation Plants of Pennsylvania

    Alethopteris serlii Late Pennsylvanian Llewellyn Formation St. Clair, PA
  17. historianmichael

    Macroneuropteris macrophylla

    From the album: Llewellyn Formation Plants of Pennsylvania

    Macroneuropteris macrophylla Late Pennsylvanian Llewellyn Formation St. Clair, PA
  18. historianmichael

    Alethopteris serlii

    From the album: Llewellyn Formation Plants of Pennsylvania

    Alethopteris serlii Late Pennsylvanian Llewellyn Formation St. Clair, PA
  19. historianmichael

    Alethopteris serlii

    From the album: Llewellyn Formation Plants of Pennsylvania

    Alethopteris serlii Late Pennsylvanian Llewellyn Formation St. Clair, PA
  20. historianmichael

    Lepidostrobophyllum hastatum

    From the album: Llewellyn Formation Plants of Pennsylvania

    Lepidostrobophyllum hastatum Late Pennsylvanian Llewellyn Formation St. Clair, PA
  21. historianmichael

    Asterophyllites longifolius

    From the album: Llewellyn Formation Plants of Pennsylvania

    Asterophyllites longifolius Late Pennsylvanian Llewellyn Formation St. Clair, PA
  22. I visited a coal mine last weekend with a group, and we had a good time finding Carboniferous era fossils. There were large volumes of plant fossils. I did find a few marine fossils (brachiopods) also. I found the "thing" below as well, which mystified me. I found it splitting a rock, and there was a counterpart as well. I did not retain the counterpart, perhaps I should have (it was broken). Formation: Pottsville Group Age: Pennsylvanian Period, Westphalian-A (312 million years old) .Jefferson County, AL Anyone know what this might be?
  23. With the nicer weather last week, I was able to make two brief trips to kick of the year. There still ended up being a lot of snow on the ground, but it was manageable. My first trip was to one of my favorite sites, a roadcut in the Pennsylvanian LaSalle Limestone in Illinois. Lots of the usual stuff was found, but the two trip makers were a small Peripristis shark tooth and a Linoproductus mass mortality plate. Here's the tooth. I think it will clean up nicely. And here are the Linoproductus. There's around 50 individuals present, and they are all quite small compared to most Linoproductus specimens I find at this site. This is probably the best brach plate I've found here. Here's a random shot I took of the headwall. Most of the common brachiopod species at this site are visible. A few days later I had a couple hours free in the morning and checked out some new Ordovician spots in southern Wisconsin. Here's a neat roadcut I drove past, showing the contact between the Ancell and Sinnipee Groups. The lower unit is the St. Peter Sandstone and the upper unit is the Pecatonica Member of the Platteville Formation. The Glenwood Shale is the narrow shale unit between the two. The site I ended up hunting was in the Grand Detour Member of the Platteville. In this area it's mostly dolomite, and most fossils are internal molds. The preservation is thus not great, but splitting rock can yield nice mollusks on occasion. Here's a typical example of the molluscan hash. This large Ctenodonta was a nice treat. It's about 6cm at the widest dimension. The trip maker was a coiled nautiloid, the first I've found. I am not sure on the ID. It measures about 2cm in diameter.
  24. cngodles

    Limestone Split

    Split the limestone, and when tying to cleave down the rock, split the fossil. Lucky for me, it split in between the inside and outside shell. Going to glue it back together with paraloid. Highly probable Metacoceras.
  25. I am having trouble putting a label on this cephalopod from the Upper Pennsylvanian, Graham formation, Finis Shale member, from Jacksboro Texas. The conch is crushed on the anterior end which distorts the apical angle but the intact posterior end shows an angle of around 12º and the cardinal ratio is about 2. My first thought was bactrites but if that is the siphuncle it appears to be very near but not quite in contact with the ventral wall, which I thought was a requirement for the whole subclass. It looks a little like the “doubtful” genus Cylobactrites with the foldlike ribs and missing ventral lobe, but the treatise shows those to be Mid-Denonian. Maybe the ribs could be described as annulations and the siphuncle as subventral making it a nautiloid like some Brchycycloceratidae but B. normale and B. curtum are all I see on the fauna list for the site and they have much large apical angles at around 22º and 40º. Any ideas?
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