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Is This A Fossil Or A Rock?


koscojo

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It looks like a concretion to me, but don't take my word on it.

An interesting piece none the less.

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Looks like a concretion (i.e., a mineral nodule) to me, too. Pretty neat piece! Welcome to the forum, Koscojo. I'm only an occasional visitor to this site, but the people on here are pretty knowledgeable.

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It doesn't look like any concretion that I have seen, but it does resemble the red algae Solenopora sp. Solenopora is fairly common though out the Paleozoic and Mesozoic. Really need to see a close up (x10 - x20) for a determination.

2012 NCAA Collegiate Round Ball Champs; and in '98, '96, '78, 58, '51, '49, and '48, too.

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Question. What is the composition of this material, (chert, siltstone, Limestone)? Are the pictures of one specimen or different specimens? To make my pictures small enough to load, I use paint to reduce them. Others may have a better way. What was the material (rock) were it was found. Do possibly know the age of the rocks where it was found?

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I don't know the composition. Some parts can break easily and it is black, but some other areas look more rusty. This is one specimen. It was found in sand by a river in NW Missouri, a place noted for Pennsylvanian specimens.

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