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Found these along the Colorado River near El Campo, Texas. MY dad and I think it is a tooth of some sort. We have found mammoth and mastodon teeth here. Let me know what you all think it is as we cannot decide. Thanks!

Ancient Colorado River mystery solved: Ancient shallow sea with strong tides. University of Oregon. December 17, 2020 https://www.sciencedaily.com/releases/2020/12/201217092354.htm The papers are: Dorsey, R.J., O'Connell, B., McDougall, K. and Homan, M.B., 2018. Punctuated sediment discharge during early Pliocene birth of the Colorado River: Evidence from regional stratigraphy, sedimentology, and paleontology. Sedimentary Geology, 363, pp.1-33. https://eartharxiv.org/repository/view/1542/ https://www.researchgate.net/publication/320147485_Punctuated_Sediment_Discharge_During_Early_Pliocene_Birth_of_the_Colorado_River_Evidence_from_Regional_Stratigraphy_Sedimentology_and_Paleontology https://www.researchgate.net/profile/Rebecca_Dorsey Kevin Gardner, Rebecca J. Dorsey. Mixed carbonate-siliciclastic sedimentation at the margin of a late Miocene tidal strait, lower Colorado River Valley, southwestern USA. Sedimentology, 2020. Brennan O'Connell, Rebecca J. Dorsey, Stephen T. Hasiotis, Ashleigh v.s. Hood. Mixed carbonate-siliciclastic tidal sedimentation in the Miocene to Pliocene Bouse Formation, palaeo-Gulf of California. Sedimentology, 2020. https://eartharxiv.org/repository/view/1878/ Yours, Paul H.

This is an isolated find, mixed in a gravel pediment perched above the Colorado River. So I cannot even guess what formation it was derived from. The first photo looks like the anchor to bedrock. The third photo is the top view.

I’m pretty sure this is a bison mandible. Is there anyway to tell which bison it came from?

Found this fossil yesterday on a sandbar in the Colorado River in Columbus, Texas. Can anyone help me identify it? Thank you!

Hello all, I recently discovered some awesome petrified wood in some large landscape river rock near my office. I have always collected petrified wood since I was a kid and this peaked my interest again. In an attempt to find out more about the wood, I found out that the rock was taken from the Colorado River near La Grange, TX. As I was collecting more specimens, I came across this which appears to be fossilized bone. It is much lighter than what a rock that size would be and has many odd features that seem to resemble bone. Can you guys offer some knowledge on whether you think this is bone and any other information you may have? I love collecting fossils/rocks but have not studied any sort of paleontology so I am totally green to formations, periods, etc. Most of my finds get put on display at my office or home and I never really know much about them. Im starting to learn though! The following pictures are the "bone" in question. Thank you!

After a recent post by new member Kyen I decided to post this tooth I found a while back on the Colorado River, TX. I assumed it to be mastodon, but after looking at pics that @Harry Pristis posted, I would like to know if this could be senile gomph chunk?