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Hi Fossil Forum! This past Monday I was searching my favorite gravel bar in SE Texas and I came up with some pretty great finds including my first ever ground sloth claw core but there was one object that has me and a few other people scratching our heads. I'm assuming that along with all of the other identifiable bone fragments I've found at this spot that this dates to the Pleistocene but there is Cretaceous invertebrate material and petrified wood that possibly date from the Eocene through the Pleistocene that I've found here as well. On to the mystery object! This articular surface just screams proximal tibia at me but I'm not satisfied with any matches I've tried to make to Camel, Bison, Horse etc. however there is a fair bit of damage along the edges so maybe I won't be able to nail down a species. I would at least like to confirm the element if possible and maybe narrow it down to family or genus. (oh and the scale just says metric but I'd hope it's obvious that the scale is in CM) It's the diaphysis that really leaves me and others confused and thinking possibly pathological because this doesn't look right at all for a tibia, at least not any that I've seen before! Apologies for the horrible focus on some of these images (especially the last one), the three dimensionality of this piece has been giving me some trouble when attempting to photograph it. I would really appreciate any thoughts y'all might have on this one! Thanks, Cdiggs

Crossing the Guadalupe River ( a Texas State Park) today when one of my dogs picked this bone up out of tree ramble/debris in the water. I thought it was very interesting, so I snapped a video and set it down on a boulder. I had plan to pick it up on my way back out. But I forgot all about it and took a different route back to my car. I am home now, going through my pictures and ran across the video. As you may imagine I’m really worried it might be a human bone, . Can y’all help me out with what you believe the bone to be. Human or animal. for reference I am 5’5”

Had a good trip down to the river this weekend. Found several pleistocene things. I've been identifying things, and I'm going to try to post them in a trip post later this week. But very unsure about this one. Right now I don't even have a good guess.

Hello. A quick introduction. I have been walking the kaw for decades and have amassed a collection of artifacts and bones. What I have not amassed is the ID skills, especially between bison and cow. There are hints in the area I hunt that at one time, long ago, a butchery that either has eroded off the bank or they discarded items into the river. Guessing it was near Grantville, Kansas. So it can be a bit confusing for me between that and how the river deposits in general can age at different rates depending on where they’ve been hiding out. I really look forward to getting to know the items I have and some of you! My goal is to start pairing down my collection. I want to be accurate and honest about what I am presenting and not just going on Google guessing. Thanks for any help and if there are things I can do to improve my postings in the future please feel free to push this newb around and set me straight. Thank you. and now, the first bone. Am I correct in thinking this is a tibia? Is there a sure way to know if it’s bison or cow?

Hi everyone! I'm now living just outside Saskatoon and I am working with the University of Saskatchewan's Museum of Natural Sciences. The Saskatoon area is largely undescribed in paleontological literature, so I have been visiting various sites around the city in the hope of finding some fossils. I found these specimens in sediment exposed by construction excavation. I have several other bone fragments from this site, all exhibiting mineral staining, but they are likely ribs and vertebrae which are difficult to identify to the species level. The first is clearly a mammal limb bone. I believe it to be the distal end of a tibia. It is heavily water-worn, but I believe I can still make out the impressions of the double trochlea. I know that a reliable method of identifying tibias to either Perissodactyla or Artiodactyla is to observe the impressions of the double trochlea (credit to this thread for helping me with this!): I think I can make out the impressions, though I'm not sure if they are at an angle or if they truly run fore and aft. I would greatly appreciate some more input on this and some fresh eyes! I've included a (somewhat crude) rendering to help illustrate what I think I see. If it does belong to the Perissodactyla group, I can confidently assign it to Equus indet., establishing the specimen as a fossil. The second object looks and feels like a fragment of mammoth ivory. It has the distinctive bark-like outer texture and it is almost identical in most regards to confirmed fragments of mammoth tooth I have. I don't know what the dark substance is on the underside. I have no idea how something that looks so biological could be produced by a construction site, so I strongly suspect it is at least something organic. I don't know how helpful photos are in identifying mammoth tooth fragments, but if an identification is possible I would really appreciate it! If I can identify either one or both of these specimens as Pleistocene fossils, I can designate the site as a fossiliferous location and continue my work in the area with more confidence. Thank you all!

This is another bone I picked up last week in the Peace River. I have been trying to ID it but think maybe it will have to be put in the "chunkasaurus" pile. I was leaning toward a section of sloth or other mammal tibia. Any help would be appreciated. Bone is almost 6" long x 3" at the wide end tapering to 1.25" and 2.5" high. The curvature and tapering of the bone is what led me to think possibly a section of sloth tibia.

his was found in a creek in the twin city area in Minnesota. Looks old to me but maybe just discolored from being in the water? Thanks in advance T