HClapper Posted October 6, 2020 Share Posted October 6, 2020 Found this while hiking in a mostly dry creek bed in North West Arkansas. Picked it up because I thought it was interesting. When I first spotted it I thought it was a piece of bone. Seems very solid, no porousness in the center or striations outside. Is it a fossil of something? Just a neat rock? Link to comment Share on other sites More sharing options...
Thecosmilia Trichitoma Posted October 6, 2020 Share Posted October 6, 2020 It looks geologic to me. I don't know what the black circle is. It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt -Mark Twain Link to comment Share on other sites More sharing options...
PrehistoricWonders Posted October 6, 2020 Share Posted October 6, 2020 It looks like it has quartz in the middle, doesn’t look like a fossil to me. Link to comment Share on other sites More sharing options...
Rockwood Posted October 6, 2020 Share Posted October 6, 2020 It's hard to say for certain, but I just get the feeling that this is the inside of something fossil. An internal mold, or a fossil burrow. Link to comment Share on other sites More sharing options...
Thecosmilia Trichitoma Posted October 6, 2020 Share Posted October 6, 2020 9 hours ago, Rockwood said: It's hard to say for certain, but I just get the feeling that this is the inside of something fossil. An internal mold, or a fossil burrow. This could be true, but as it is in metamorphic rock, I believe that it would be impossible to confirm or deny this hypothesis. It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt -Mark Twain Link to comment Share on other sites More sharing options...
FranzBernhard Posted October 6, 2020 Share Posted October 6, 2020 Fossil or not, it looks quite interesting! Shape: It looks like a slightly bend fragment of a somewhat cylindrical object. Material: Can you do an acid (vinegar or muriatic acid / hydrochloric acid) and scratch test? It could be carbonate-based material or quartz-based material (inside and outside; from the appearance, outside could also be feldspar-based!). Dark ring: Quite intriguing zig-zag shape in detail. It reminds me somewhat of stylolites in the making. Or some kind of replacement texture? Franz Bernhard Link to comment Share on other sites More sharing options...
NWARockhound Posted October 6, 2020 Share Posted October 6, 2020 I think it's probably just a neat rock. There's no bone in NWA really, everything here is Carboniferous era marine fossils: a lot of crinoids, corals, shells, bryzoans, cephalopods, etc. This doesn't look like a crinoid or a horn coral, or like any of the fossils I've ever found. I suspect your rock is chert surrounded by limestone; pretty common in the area Link to comment Share on other sites More sharing options...
HClapper Posted October 7, 2020 Author Share Posted October 7, 2020 2 hours ago, NWARockhound said: I think it's probably just a neat rock. There's no bone in NWA really, everything here is Carboniferous era marine fossils: a lot of crinoids, corals, shells, bryzoans, cephalopods, etc. This doesn't look like a crinoid or a horn coral, or like any of the fossils I've ever found. I suspect your rock is chert surrounded by limestone; pretty common in the area I wondered. It didn't look like any fossils I have seen, but I haven't seen that many. I wasnt able to come up with anything close via google images, lol. I just like the look of it. : ) Link to comment Share on other sites More sharing options...
NWARockhound Posted October 7, 2020 Share Posted October 7, 2020 19 hours ago, HClapper said: I wondered. It didn't look like any fossils I have seen, but I haven't seen that many. I wasnt able to come up with anything close via google images, lol. I just like the look of it. : ) The Ozarks are certainly full of great rocks! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now