lildragon Posted February 6, 2018 Share Posted February 6, 2018 Hello everyone! Today we found a few more fossils on grandfather's attic we did not recognize. #1: ??? Somesort of fossilized seed maybe? It is rock hard, and turned to stone. (This fossil is smaller than a walnut, but larger than a hazel nut.) ID'd as dermal denticle from a skate by AlDente. #2: Looks and feels like fossilized wood, but it's quite unique. We haven't found a second one like this on the attic. ID'd as Selenite by Ynot. #3: These were found amidst bivalves: #4: Plates with patterns which reminded us of dendrites. Is this somesort of pseudo-fossil? ID'd Stromatolites by Rockwood. Thanks in advance! Link to post Share on other sites
Rockwood Posted February 6, 2018 Share Posted February 6, 2018 4 minutes ago, lildragon said: #4: Plates with patterns which reminded us of dendrites. Is this somesort of pseudo-fossil? I think they may be stromatolites. Link to post Share on other sites
ynot Posted February 6, 2018 Share Posted February 6, 2018 13 minutes ago, lildragon said: #2: Looks and feels like fossilized wood, but it's quite unique. Looks like selenite. A form of calcite. Link to post Share on other sites
Rockwood Posted February 6, 2018 Share Posted February 6, 2018 24 minutes ago, ynot said: Looks like selenite. A form of calcite. A form that could have been a crinoid stem section originally ? Link to post Share on other sites
ynot Posted February 6, 2018 Share Posted February 6, 2018 2 minutes ago, Rockwood said: A form that could have been a crinoid stem section originally ? Does not look like that to Me. Link to post Share on other sites
FossilDAWG Posted February 6, 2018 Share Posted February 6, 2018 Something for scale would be helpful. I have no idea of the size of the first object for example. The fossil on the left in photo 3 may be an internal mold of a brachiopod, possibly a pentamerid such as Stricklandia. More views could be helpful. #2 is likely a mineral, as has been suggested. Don 2 Link to post Share on other sites
Darktooth Posted February 6, 2018 Share Posted February 6, 2018 2 hours ago, ynot said: Looks like selenite. A form of calcite. Selenite is a form of gypsum. C'mon ynot, rookie mistake. 1 Link to post Share on other sites
ynot Posted February 6, 2018 Share Posted February 6, 2018 5 minutes ago, Darktooth said: Selenite is a form of gypsum. C'mon ynot, rookie mistake. My bad. Dang dyslexia. Link to post Share on other sites
Darktooth Posted February 6, 2018 Share Posted February 6, 2018 2 minutes ago, ynot said: My bad. Dang dyslexia. Well I guess we will let it slide this time! Link to post Share on other sites
lildragon Posted February 7, 2018 Author Share Posted February 7, 2018 @ynot This block of Selenite was actually found inside a box full of fossilized wood, so we were quite puzzled. It looks absolutely nothing like the other gypsum crystals we found, and we found many different forms. @FossilDAWG I ordered plastic size reference plates for photography, just waiting for it to arrive by mail! Should help with future ID'ing. But to give you an idea of the size of the first fossils: It's smaller than a walnut, and a little larger than a hazel nut. Link to post Share on other sites
Wrangellian Posted February 7, 2018 Share Posted February 7, 2018 9 hours ago, FossilDAWG said: Something for scale would be helpful. I have no idea of the size of the first object for example. The fossil on the left in photo 3 may be an internal mold of a brachiopod, possibly a pentamerid such as Stricklandia. More views could be helpful. #2 is likely a mineral, as has been suggested. Don Do you think the one on the right might be the int. mold of a brach as well, though a different kind? Link to post Share on other sites
Wrangellian Posted February 7, 2018 Share Posted February 7, 2018 #4 doesn't say 'stromatolite' to me but I do see sedimentary plates with something along the lines of dendrites. 1 Link to post Share on other sites
Al Dente Posted February 7, 2018 Share Posted February 7, 2018 Number one is a dermal denticle from a skate. Modern Raja clavata have these large denticles on the ventral side of their body. 2 Link to post Share on other sites
lildragon Posted February 7, 2018 Author Share Posted February 7, 2018 1 hour ago, Al Dente said: Number one is a dermal denticle from a skate. Modern Raja clavata have these large denticles on the ventral side of their body. Wow, I would've never guessed that. Most denticles I've seen have a less round shape than this one. Thanks for the ID! Link to post Share on other sites
abyssunder Posted February 7, 2018 Share Posted February 7, 2018 I agree with Raja clavata dermal denticle. The thorn is broken off. Here is one of my finds, from the Black Sea, Romania. Link to post Share on other sites
abyssunder Posted February 7, 2018 Share Posted February 7, 2018 #4 - High resolution images would be more convincing if the features present on the plates are dendrites or possibly rhodophytes. Link to post Share on other sites
D.N.FossilmanLithuania Posted February 8, 2018 Share Posted February 8, 2018 Abyssunder is correct- it is Raja dermal denticle! Great find Link to post Share on other sites
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