debivort Posted July 8, 2022 Share Posted July 8, 2022 (edited) • Bone is from Chandler Bridge formation in Ridgeville, South Carolina. One end is partially closed over, like a node of bamboo (left panel in top image). • tooth is from Drum Island in Charleston Harbor, South Carolina. Seems to match some internet images annotated as juvenile ground sloth tooth. I'm not sure if either end is the chewing surface. Possibly the surface shown in the bottom-right two images of lower image. Thanks for any thoughts. Edited July 8, 2022 by debivort Link to comment Share on other sites More sharing options...
Shellseeker Posted July 8, 2022 Share Posted July 8, 2022 It is a sloth tooth. Look at the front molars on Harlan's and Jefferson's ground sloth in this thread http://www.thefossilforum.com/index.php?/topic/74390-sloth-tooth-for-id-please/ I think left photo shows chewing surface. I am not sure on the bone... but feeling Horse cannon bone.. @Harry Pristis What Geological age? Can you find Pliocene/Miocene fossils there? 1 The White Queen ".... in her youth she could believe "six impossible things before breakfast" Link to comment Share on other sites More sharing options...
Brandy Cole Posted July 9, 2022 Share Posted July 9, 2022 Sadly I'm really not sure there's enough of the bone to ID it. 1 Link to comment Share on other sites More sharing options...
debivort Posted July 9, 2022 Author Share Posted July 9, 2022 2 hours ago, Shellseeker said: It is a sloth tooth. Look at the front molars on Harlan's and Jefferson's ground sloth in this thread http://www.thefossilforum.com/index.php?/topic/74390-sloth-tooth-for-id-please/ I think left photo shows chewing surface. I am not sure on the bone... but feeling Horse cannon bone.. @Harry Pristis What Geological age? Can you find Pliocene/Miocene fossils there? Wonderful, thanks for the confirming the plausibility of the sloth tooth id. I think some of the material is reworked at this site, so Miocene through Pleistocene are all possible. We find horse teeth there. 2 hours ago, Brandy Cole said: Sadly I'm really not sure there's enough of the bone to ID it. The hollowness struck me as unusual - no porous filling. Is that at all diagnostic? Link to comment Share on other sites More sharing options...
Brandy Cole Posted July 9, 2022 Share Posted July 9, 2022 9 hours ago, debivort said: The hollowness struck me as unusual - no porous filling. Is that at all diagnostic? Likely not, in a bone this damaged/worn. As I understand it, it really depends on the other features of the bone and the conditions a bone has been in before it is found. Bones exposed to a lot of wear in areas like river beds or fast flowing creeks will often have their normal inner porosity worn away by the elements, especially if the bone has been broken in a way that leaves the more fragile inner parts are exposed. For example, here's a large rib bone fragment from Pleistocene megafauna in my area. It's a very stout bone that shouldn't be hollow, but it's broken in a way that let floodwater and gravel wear away the more delicate material inside, mostly only leaving the stronger cortical bone. 3 Link to comment Share on other sites More sharing options...
debivort Posted July 9, 2022 Author Share Posted July 9, 2022 Thanks Brandy, that's super helpful. My specimen shows little sign of rounding wear - all its surfaces are well preserved or cleanly broken. Here are some pictures that capture a bit more of that detail: It seems from this thread that crisp-edged bones like this can also be hollow (and hard to ID, apparently): Link to comment Share on other sites More sharing options...
JohnJ Posted July 10, 2022 Share Posted July 10, 2022 @ Something not that obvious in your first images is the highlighted groove seen better in you second set. This is a clue to the possible ID. 1 1 The human mind has the ability to believe anything is true. - JJ Link to comment Share on other sites More sharing options...
debivort Posted July 10, 2022 Author Share Posted July 10, 2022 Just now, JohnJ said: Something not that obvious in your first images is the highlighted groove seen better in you second set. This is a clue to the possible ID. Yes, I realized that the original pictures weren't lit appropriately to show the shape. Link to comment Share on other sites More sharing options...
Shellseeker Posted July 10, 2022 Share Posted July 10, 2022 You should take a look at these threads... http://www.thefossilforum.com/index.php?/topic/110974-horse-cannon-bone-question/ http://www.thefossilforum.com/index.php?/topic/116599-an-interesting-bone/ I'm thinking it is a small Tridactyl horse Metatarsal/Metacarpal 2 The White Queen ".... in her youth she could believe "six impossible things before breakfast" Link to comment Share on other sites More sharing options...
debivort Posted July 10, 2022 Author Share Posted July 10, 2022 42 minutes ago, Shellseeker said: You should take a look at these threads... http://www.thefossilforum.com/index.php?/topic/110974-horse-cannon-bone-question/ http://www.thefossilforum.com/index.php?/topic/116599-an-interesting-bone/ I'm thinking it is a small Tridactyl horse Metatarsal/Metacarpal Thanks for these leads - I think I may have found a good match here as well: https://www.worthpoint.com/worthopedia/fossil-anchippus-horse-metapodial-1854104927 My specimen looks a lot like the green portion highlighted here: 1 Link to comment Share on other sites More sharing options...
Shellseeker Posted July 10, 2022 Share Posted July 10, 2022 10 hours ago, debivort said: Thanks for these leads - I think I may have found a good match here as well: https://www.worthpoint.com/worthopedia/fossil-anchippus-horse-metapodial-1854104927 My specimen looks a lot like the green portion highlighted here: Nice, Searching the Internet for image match is always a great tool. 1 The White Queen ".... in her youth she could believe "six impossible things before breakfast" Link to comment Share on other sites More sharing options...
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