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Post by fernwood on Oct 27, 2021 6:03:03 GMT -5
Any thoughts on this one? Found April of 1983. South Shore Lake Superior by Wisconsin or Michigan UP. Part of the collection given to me by a friend. My friend’s Husband said it looked like a huge pearl in an oyster shell, but this is not an oyster shell. To me it looks like two shells, with debris in-between them. Or some type of aquatic creature with a shell under it. Penny for size reference. It is about 3” by 3” by 3”. Hardness in last photo. It is fairly heavy for size. Thank you for any help.
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Post by MsAli on Oct 27, 2021 6:32:39 GMT -5
Looks like a mussel
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Post by fernwood on Oct 28, 2021 9:31:05 GMT -5
I did some more research. Don't think this is a mussel, at least the larger part. I was unable to find any mussel photos with the aligned holes in the shells. Mussles are not normally this shape. The smaller shell might be a mussel. The larger shell looks kind of like a abalone, based on shape and the holes. But, these holes are not in one line and spread throughout.
The shape and size iof the larger shell is throwing me for a loop. It is very curved. Almost looks like a water creature more than a shell.
Help.
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Post by Peruano on Oct 28, 2021 9:39:59 GMT -5
Why not describe it for us. Photos can only do so much. To me it looks like a bivalve stuck inside a larger shell and both are erroded badly whether fossilized or merely preserved recent material that has decalcified or been attacked by other organisms.
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Post by amygdule on Oct 28, 2021 13:19:52 GMT -5
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Post by fernwood on Oct 29, 2021 6:00:04 GMT -5
I don't have much more of a description than what I posted above.
The area under the smaller shell is very round. Kind of reminds me of concrete with so much sand it did not harden well. The hard areas of the shells are much harder than some shells I have that are not fosilized.
Are there any other questions about the piece I could answer? Thanks
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Post by rmf on Oct 29, 2021 15:31:13 GMT -5
fernwood it looks like Exogyra ponderosa which is an oyster. Typically from the Cretaceous. Not sure N. WI or UP have Cretaceous.
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