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Well, without going into a lengthy explanation, yes, I found this in the Arkansas River about 3 feet under the bottom rocks and what we call the NTS (Nasty Toxic ..., unfortunately my rock hound playground is also a delisted superfund site). It took months to finally get it to where it's at now. About half a year in fact of fervent brushing and gentle filing with a diamond coated pen file. Acid has also played a major role but I'm at the point now where I can't risk using more lest I melt what I'm trying to reveal. Is there any readily available household remedy I can use as a protectant of sorts that I could apply on the delicate fossil material so that I can submerge this thing back into acid? Also, would Thyiglycolic acid benefit me here in this scenario? Thanks ~Noah Benzing https://www.youtube.com/watch?v=tn1uSydlkzQ Here is a view of the underside.... I'm getting close to revealing the actual teeth (although I have unfortunately destroyed one or two so far).

Hello Fossil Forum!, I'm new here so I guess I'll just throw this one out. Found in Sand Springs (just outside of Tulsa, Northeastern Oklahoma) on the ancient Arkansas River (Mississippian/Pennsylvanian). http://www.ogs.ou.edu/StatemapOGQ/OGQ-79_Sand_Springs_24K.pdf I've been gradually exposing whatever these things are using light applications of heavily diluted muratic/hydrochloric acid and dishwashing soap gently lathered-in with a soft toothbrush. It's taken quite some time to get it to this phase of the "preparation"... but I'm curious, I'm seeing more than just one type of organism present on this piece. Could someone perhaps enlighten me with a dose of comprehensively accurate insight? I would be ever grateful as I value your thoughts. ~Noah Benzing