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I found this gold panning in glacial deposit in northern Pennsylvania. Glacial drift material comes down from Canada so would be impossible to put time frame on unless carbon dating. My guess would be around Ice age period. Now the question is if for one this is bone in which I think is but need facts. Question two is does this look like teeth marks on side of material? Im hoping because would be first for me. Now I do find a lot of bones in glacial deposit but not much worth sharing. This piece is only 1 1/2 inch long. Thanks.

Anyone else see a badly worn and deeply buried blastoid here? Four out of five points are visible. And where the fifth should be, the rock is broken off. Just my overactive imagination? Please tell me what you think. Is there possibly a blastoid in this rock? Reasons against this being a blastoid: Guidebooks about Great Lakes fossils do not mention blastoids. Googling "blastoid and Lake Michigan" brings up nothing. It's maybe too large to be a blastoid? The diameter is 4cm. On the other hand: Just because fossil books and Google don't mention them doesn't mean that much. I've found rocks at Lake Michigan beaches that I've never seen mentioned in association with Lake Michigan. So, who knows...? Both geological surveys from Illinois and Wisconsin mention them. So they definitely grew in the shallow ancient sea that used to exist here. Anyway, if there isn't a blastoid within that rock, what is? seen from "top" seen sideways: bottom:

Part of my collection of Callovian ammonites from a glacial drift Łuków area Poland https://plus.google.com/u/0/photos/102639142152800143106/albums/5770903421056338065