lynn w Posted June 4, 2019 Share Posted June 4, 2019 Found on beach in Salvador Bay, Brazil. This is the best quality I could get with my phone. Photo with black background shows the curved part of bone well, note how smooth that part is. Color of bone in that photo is most accurate. Can anyone tell me what it is? Link to comment Share on other sites More sharing options...
Al Dente Posted June 5, 2019 Share Posted June 5, 2019 Looks like a hoof core. 1 Link to comment Share on other sites More sharing options...
ynot Posted June 5, 2019 Share Posted June 5, 2019 4 hours ago, lynn w said: Photo with black background shows the curved part of bone well, note how smooth that part is. Color of bone in that photo is most accurate. Can anyone tell me what it is? Sorry, but it is not a bone. The "smooth" part is a conchoidal fracture which identifies this rock as a piece of chert/flint. Edit.. really missed this one. 2 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
lynn w Posted June 5, 2019 Author Share Posted June 5, 2019 (edited) 24 minutes ago, ynot said: Sorry, but it is not a bone. The "smooth" part is a conchoidal fracture which identifies this rock as a piece of chert/flint. It's very light-weight and porous in spots, would a rock be like that? Up close there are the spongy looking or porous areas that a bone might have. I'm clueless, so am open to it being just a rock. Edit: here's a link to photos of a bison hoof core, shape and smoothness of the curved part is very similar: http://oldglassbottles.blogspot.com/2013/10/bison-antiquus-hoof-core-fossil.html Edited June 5, 2019 by lynn w Photo Link to comment Share on other sites More sharing options...
ynot Posted June 5, 2019 Share Posted June 5, 2019 2 hours ago, lynn w said: It's very light-weight and porous in spots, would a rock be like that? Up close there are the spongy looking or porous areas that a bone might have. The porous / spongy looking areas on Your rock are on the outside (typical of chert/flint). With bone the porous / spongy areas are the inside marrow cavity. The resemblance to a hoof core is a coincidence of nature. Aside from the general shape there are no other features of a hoof core. Edit... this is all wrong. 1 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Brett Breakin' Rocks Posted June 5, 2019 Share Posted June 5, 2019 Can we gat a shot of the "back" portion that connects to the phalanges. Definitely looks like a hoof core. Cheers, Brett Link to comment Share on other sites More sharing options...
lynn w Posted June 5, 2019 Author Share Posted June 5, 2019 11 minutes ago, Brett Breakin' Rocks said: Can we gat a shot of the "back" portion that connects to the phalanges. Definitely looks like a hoof core. Cheers, Brett Will take a photo later, have to go to a meeting. Thanks. Link to comment Share on other sites More sharing options...
Brett Breakin' Rocks Posted June 5, 2019 Share Posted June 5, 2019 I've increased the contrast .. that is porous bone and resembles a large bovid hoof core. For Comparison Bison: Link to comment Share on other sites More sharing options...
Xiphactinus Posted June 5, 2019 Share Posted June 5, 2019 another vote for hoof core. Looks like a small deer. Link to comment Share on other sites More sharing options...
Brett Breakin' Rocks Posted June 5, 2019 Share Posted June 5, 2019 4 minutes ago, Xiphactinus said: Looks like a small deer. Ooops .. are those cm ? haha .... ahh well. Cheers, B Link to comment Share on other sites More sharing options...
Xiphactinus Posted June 5, 2019 Share Posted June 5, 2019 1 minute ago, Brett Breakin' Rocks said: Ooops .. are those cm ? haha .... ahh well. Cheers, B That would be one big ol foot if those were inches! Link to comment Share on other sites More sharing options...
Brett Breakin' Rocks Posted June 5, 2019 Share Posted June 5, 2019 2 minutes ago, Xiphactinus said: That would be one big ol foot if those were inches! Haha ... Link to comment Share on other sites More sharing options...
ynot Posted June 5, 2019 Share Posted June 5, 2019 1 hour ago, Brett Breakin' Rocks said: For Comparison Bison: The bison hoof cores are bilaterally symmetrical. The piece in question is not bilaterally symmetrical The leading edge of the bison hoof core has a sharp edge and has a uniform curve. The piece in question has a rounded edge and has a straight line. The bison hoof core's articulation surface extends from edge to edge and shows a typical bone surface texture.. The corresponding part of the piece in question does not. I stick with this being a chert nodule with a conchoidal fracture that is suggestive of a hoof core, but it is not. Edit... boy did I miss this one Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Caleb36 Posted June 5, 2019 Share Posted June 5, 2019 10 minutes ago, ynot said: The bison hoof cores are bilaterally symmetrical. The piece in question is not bilaterally symmetrical The leading edge of the bison hoof core has a sharp edge and has a uniform curve. The piece in question has a rounded edge and has a straight line. The bison hoof core's articulation surface extends from edge to edge and shows a typical bone surface texture.. The corresponding part of the piece in question does not. I stick with this being a chert nodule with a conchoidal fracture that is suggestive of a hoof core, but it is not. I agree with the conchoidal fracture but would weathering cause the tubelike porous structures on the edges? I've seen pitting and things like it but not the pinhole sized "tubes". They might be grooves or scratches but they all seem to curve towards the center. Link to comment Share on other sites More sharing options...
Brett Breakin' Rocks Posted June 5, 2019 Share Posted June 5, 2019 Yeah .. those sure look like pores in a bone and are uniform in nature @Harry Pristis the shot of the articulating surface in the back should help the ID. Cheers, B Link to comment Share on other sites More sharing options...
lynn w Posted June 5, 2019 Author Share Posted June 5, 2019 (edited) Here are some more photos. Not sure what you mean by the 'the articulating surface in the back', please let me know if one of these doesn't capture it. I can stick the end of a paper clip 1/2" into some of the smaller 'pores', over 1" into the larger pores. Honestly, this piece sure looks a lot like some of the ones posted. Edit: And thank you all for your time! Edited June 5, 2019 by lynn w Link to comment Share on other sites More sharing options...
ynot Posted June 5, 2019 Share Posted June 5, 2019 OK, I retract My previous statements, it is a hoof core. Maybe cow? I would like to point out that bison never made it to Brazil. Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Harry Pristis Posted June 5, 2019 Share Posted June 5, 2019 Bovid hoof core, definitely. For comparison: http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
Brett Breakin' Rocks Posted June 5, 2019 Share Posted June 5, 2019 10 minutes ago, ynot said: I would like to point out that bison never made it to Brazil. Yeah, no worries ... for some reason I could only find nice shots of bison cores .... Google is a fickle beast. Cheers, B Link to comment Share on other sites More sharing options...
lynn w Posted June 5, 2019 Author Share Posted June 5, 2019 What's the most likely animal, then? Cow? Horse? Something else? And is it from something that died last year, last century, or longer? The quality and angle of my first photos wasn't good, seeing a rock is understandable. Link to comment Share on other sites More sharing options...
Brett Breakin' Rocks Posted June 5, 2019 Share Posted June 5, 2019 1 minute ago, lynn w said: What's the most likely animal, then? Cow? Horse? Something else? Yes, most likely modern .. especially if it feels light, and the color suggests modern. Also, it is a bovid of some sort from Brazil .. as we suggested some type of cattle breed. Not sure you are gonna get much more specific than that ... I pick up modern deer hoof cores on occasion on the river and they can be stained dark brown by the tannins in the water, or sometimes more bleached and dried out like your example. Cheers, Brett Link to comment Share on other sites More sharing options...
lynn w Posted June 5, 2019 Author Share Posted June 5, 2019 11 minutes ago, Brett Breakin' Rocks said: I pick up modern deer hoof cores on occasion on the river and they can be stained dark brown by the tannins in the water, or sometimes more bleached and dried out like your example. Cheers, Brett Yeah, it had a lot of dark brown when I found it, got more bleached-looking when it dried out. Many thanks to all of you for speaking up. Link to comment Share on other sites More sharing options...
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