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Showing results for tags 'fossil cast'.
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Hey all, My daughter and I were agate hunting in Oregon's North Coast Range, when I scooped this curious piece out of the river. These grooves or striations have me wondering if this may have formed against some type of mollusk fossil. I would know this mineral as a "seam agate", however I have never seen grooves/striations like this before in the chalcedony. Has anyone encountered anything like this before or have any thoughts. I'de be curious to know more if anyone has. Thanks!
- 7 replies
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- agate
- chalcedony
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I found this piece outside Kansas City, Kansas. It was found with some other fossils from the Carboniferous (many shells). It looks like a cast or a mold? Maybe a really large Gastropod? Pictures attached.
- 5 replies
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- fossil cast
- gastropod
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