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  1. Following a refreshing swim at the lake with a few friends over the weekend, I decided to take a spur-of-the-moment stop at a construction site I happened to be driving by. The sun was setting, cooling the area and finally making it hospitable despite the recent heat wave. I was not familiar with the exact geology of where I was, but with only an hour and a half of daylight left I decided to not waste too much time and immediately began scouring the dirt. I quickly noticed that the ground was composed of two distinct formations. The higher layer was a grey limestone while the layer
  2. Tidgy's Dad

    ADAM'S SILURIAN

    Hoooooooooooorrrrrrrrrrrraaaaaaayyyyyyyyyyy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Here we are at last, into Adam's Silurian. Thanks for looking. First up is the Lower Silurian or Llandovery and I begin with a problem. I posted this one incorrectly in Adam's Ordovician as it had got it's label muddled up with an Ordovician Favosites I had that has vanished in the move here, but is being replaced by kind forum member @Herb Anyway, this, I remember now I've found the correct label, is from the greenish Browgill Formation, part of the Stockdale Group from a cutting near Skelg
  3. After a lot of research, I made this family tree for all of Cephalopoda. I have posted major resources below. Dates and lots of other stuff: https://paleobiodb.org/#/ Mass Extinction events https://samnoblemuseum.ou.edu/understanding-extinction/mass-extinctions/end-ordovician-extinction/ https://samnoblemuseum.ou.edu/understanding-extinction/mass-extinctions/late-devonian-extinctions/ Ammonoid classification: https://www.researchgate.net/publication/292489944_Fossil_Focus_Ammonoids Extinction of the Goniatites: https://www.nationalgeographic.
  4. Ludwigia

    Nautiloid Treptoceras trebriseptum

    From the album: Slices

    Toronto, Canada. Georgian Bay Formation, Ordovician.
  5. Took a little trip to Lake Jacksboro spillway and concentrated on the microzone hoping to find some of the little goniatites and nautiloids. Only found a couple that were "big enough" to see , but once I went through my bag of matrix, I was happy to have found quite a few of the microfauna! A few I am not sure of the ID so any help is appreciated! All of these are 1/8 to 1/16 inch Goniatite Peritrochia sp. Nautiloid Gastrioceras listeri same as above, I think Goniatite Prouddenites bosei Goniatite Cardiella ganti
  6. It took some time, but thanks to Covid-19 (!! - see acknowledgements) its out now: A Systematic Study of upper Silurian (Ludfordian) Nautiloid Cephalopods from the Eggenfeld Section (Graz Palaeozoic, Styria, Austria) (pdf, external site) Here is my last visit to that site: Visiting some of the oldest fossils of Styria, Austria (Silurian orthocerids and brachiopods) - Fossil Hunting Trips - The Fossil Forum Best of all, some of my former specimens are pictured in that paper, especially some polished sections (see acknowledgements). Franz Bernhard
  7. Creek - Don

    Central Texas Nautiloid

    Hi everyboy. I stopped by the road cut near I14 and I35 in Belton, Texas today and found these two nautiloids lying side by side. Are these Eutrephoceras nautiloids? I have never found these before. I looked at geologic map, and it's showing up as Weno Limestone and PawPaw Formation. One measures 120 mm and smaller one at 100 mm.
  8. My next door neighbor, Jim, was kind enough to take me to my cataract surgery today, and after I took him out to breakfast, we had a little time to kill before my follow up appointment. On a whim, I suggested an Austin Chalk creek stomp since current drought conditions wouldn't result in muddy shoes. It was a fortuitous move, as the creek outperformed expectations. The bedrock there is slow to erode, so I've rested the site for a few years. We got 2 nice Eutrephoceras nautiloids. The one that Jim is posing with below is now cut to a nice pedestaled display piece wh
  9. Near the shores of the south-eastern Randsfjorden in Norway is a loaction with an Early Silurian outcrop. Last summer I found some gastropods and this nautiloid in a road-cut on a rock which seems to be sandstone, of very hard material. It seems to be an orthocone, although very slightly bended with the siphuncle visible on the top cross-section, placed in a semi-central position. Could it be possible find out which order and family it belongs to? I guess it is not an endoceras, because the siphuncle is not very large. The lenght of the speciemen is about 12cm.
  10. PaleoOrdo

    Nautiloid or trilobite?

    I wonder if this fossile is a trilobite or a nautiloid, from Late Ordovician in the Oslo-field, Norway.
  11. Bringing Fossils to Life

    Spyroceras?

    Hi everyone! I was going through my Swatara Gap fossils when I came across this specimen, which I had originally thought to be coral. However, it looks similar to pictures of Spyroceras I've seen. Can anyone help? The first picture shows the texture, the second picture is a cross section, and the third picture is an imprint on the other side of the rock that looks cephalopody.
  12. This was my first trip to Trinity river in Tarrant co., this section was close to borders of QT and QAL and didn't know what to expect. I certainly didn't expect to lift up rock and find a Nautiloid/Nautilus still soft in the marl. Have no idea what the marl was or how to determine age of this. Only prepped it a little afraid to mess it up. Tooth from same place and hesitant to call it bison since they're always bovid.
  13. PaleoOrdo

    Nautiloid? Help Id please

    I found this stone with some unknow pattern in the Kalvsjøen formation, Oslo field (late Katian, in late Ordovicium). Can it be two nautiloids or alge? It is some small gastropods there too. The length of the longest "nautiloid" is about 7 cm.
  14. Samurai

    Nautiloid in phosphatic nodule

    Location: Missouri Period: Pennsylvanian Formation: Iola Limestone (Muncie Creek Shale Member) (MO) hello! this is my first nautiloid in a phosphatic nodule from this locality and unfortunately the split wasn't desirable, nevertheless you can see the inside beauty of this specimen I know the genus Prouddenites have been found in these phosphatic nodules as the user Missourian happened to have a post from a couple years back showing his specimen the only issue is with mine its harder to see what it is since the outer shell isn't that v
  15. Finally finished some new artworks! Ammonites and Nautiloid is 56" x 30"....it's a big one! Trilobites18" x 24"
  16. Rogue Embryo

    Orthoconic nautiloid?

    Hello. Any comments on this find (3 photos below) at Mimico Creek in Toronto (species, anatomy, etc.) would be appreciated!
  17. PaleoOrdo

    Nautiloid or graptolite?

    I wonder if this fossile in a shale is a graptolite or a nautiloid. The length is about 3cm, age middle ordovician, in the Elnes formation. The place has many graptolites. Pict. 1 Pict. 2 I also found this 1,5 cm long specimen, which seems to be a nautiloid?
  18. I_gotta_rock

    Nautiloid

    From the album: Delaware Fossils

    Late Cretaceous Eutrephoceras dekayi from the C and D Canal in Delaware
  19. tombk

    Ordovician Maclurites?

    Hi all, I'm on vacation about 8 miles east of Galena Illinois. I was going to wait until I got home to post a travel piece. I'm too excited to wait, though. I had reached out to a few rock/fossil clubs asking whether there are any known collecting sites around here, and nobody knew of any. There's a road-cut near where I'm staying, and I found what I think is a maclurites fossil! It's not in the best condition, but not bad for about 450-million years old! From what I can tell, the exposed rock around here is in the Galena Group (Trenton Limestone). One app says the stratigraphic unit is the Mi
  20. Sorry for all the posts, but I'm trying to post some of the bizarre/unidentified pieces from my big brook fossil collection. Here is the best example of a fossil I've found a few of over the years. I assume it's some type of shelled cephalopod, but I have no idea what. Once again going to call @Trevor for his help, and hope I'm not being rude in doing so!
  21. Lone Hunter

    Just a little pebble

    Calling this a Picasso pebble, it's like a tiny work of art and I have no idea how to refer to this type of fossilization but it's very cool. Anyway, really curious what the two columns are that appear to be joined, the gravels it came from are mostly Eagle Ford but include QAL, a little Woodbine, and older.
  22. Hello again guys! This specimen is more special. Initially I took it because I saw a nautiloid in it. Totay I found there is also a trilobite inside it. Then I started to suspect if the Nautiloid part is not also the same trilobite. It is the same layer as yesterday, same place. Probably middle - late Ordovician. Found near boul. DesSources, on the shore of the river between Laval and Montreal. #1 #2 #3
  23. Hello guys! That was outside of my plans to search in such direction, however a small comment started a big discussion about the possibility to have magma melting the rocks and sealing some fossils. In fact what I was suggesting as simple "melting" seems to be a very complex process or group of processes, that I would suggest to discuss here. So it was already commented, that magma can't really melt other rocks. The temperature of magma is not high enough and it will cool down . Still we see many effects of the magma on the rocks and especially on the sediments and fossils. Here I
  24. Dimitar

    Nautiloid Cephalopod Ordovician

    Hello guys! Today I visited antother place between Montreal/ Laval, on the North shore of Montreal. Spectacular place, many fossils. But the mostly found is a nautiloid/ cephalopod. I've seen such speciments already, however on this place there were so many of them, can't compare it with other places that I visited. In addition, other specimens before were spread out of their original position. Here I have all in one place, the original place . all specimens #1, #2 , #3 N3 #4
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