andyiii
off to a rocking start
Member since May 2024
Posts: 21
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Post by andyiii on May 17, 2024 19:25:29 GMT -5
Hello folks, I took my first long walk on the shore of Lake Ontario 2 days ago, generally looking for rocks to tumble, and I also found this. Usually the fossils along this area are jumbled up "death plates" of many little shell pieces in basic gray basalt (I think). this one stood out for size and detail, plus the cavities inside the shell never filled with the base rock, so they have some druzy in them: ![](https://res.cloudinary.com/forum-rocktumblinghobby-com/image/upload/v1715992079/qiwsfc0fi4nrz7eosmqm.jpg) ![](https://res.cloudinary.com/forum-rocktumblinghobby-com/image/upload/v1715992085/avunc6mh6dujrtmwcvbl.jpg) ![](https://res.cloudinary.com/forum-rocktumblinghobby-com/image/upload/v1715992089/c5yjobmoskcf0yq5eyms.jpg) ![](https://res.cloudinary.com/forum-rocktumblinghobby-com/image/upload/v1715992092/coo3nzvhfc62mclbgxzv.jpg) ![](https://res.cloudinary.com/forum-rocktumblinghobby-com/image/upload/v1715992094/gas6syrhjpntesxotgbs.jpg) I'm a complete novice when it comes to fossils, so if anyone can identify what this is, I'd appreciate it! Thanks, Andy III
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gunsil
spending too much on rocks
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Member since January 2023
Posts: 331
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Post by gunsil on May 18, 2024 11:02:13 GMT -5
Sorry, not a fossil.
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andyiii
off to a rocking start
Member since May 2024
Posts: 21
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Post by andyiii on May 19, 2024 18:20:23 GMT -5
Oh wow, really? With the sharp, well-defined edges and chambers, I thought I was looking at something like a cross-section of a snail shell.
Thanks, Andy III
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Post by RickB on May 20, 2024 13:54:31 GMT -5
Try putting a little vinegar on it and see if it fizzes/bubbles - a simple test for calcium carbonate.
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Post by amygdule on May 20, 2024 14:58:07 GMT -5
Oh wow, really? With the sharp, well-defined edges and chambers, I thought I was looking at something like a cross-section of a snail shell. Thanks, Andy III Looks like a fragment of some kind of Cephalopod, like a nautilus or ammonite.
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