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Showing results for tags 'shell hash'.
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Purisima Formation (3-7 Ma), Santa Cruz, CA: One piece doesn’t match the rest
Slow_BS posted a topic in Fossil ID
Hi there, I have a collection of Santa Cruz, CA shell hash, from the Purisima Formation. It’s pretty much all non-mineralized mollusks, I think. I received a new piece that seems to be from the same formation (it was a gift from the heir of the original collector who lived in Monterey - the other side of the bay from the formation). The fossiliferous pieces inside this one have a totally different structure - much more of a radial/flakey look. I circled it in red in the first picture, and it’s the only rock in pics 3-6. I’d love to here if anyone has any thoughts on whether the new piece is Purisima, and what the white portions may have been. Thanks for reading!- 14 replies
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- california
- fossiliferous
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Fossil Shell Hash Responsible for Florida’s Cannonball-Eating Spanish Fort
Oxytropidoceras posted a topic in Fossil News
The Mystery of Florida’s Cannonball-Eating Spanish Fort The secret is inside the walls themselves. By Lina Zeldovich Atlas Obscura, July 4, 2019 https://www.atlasobscura.com/articles/coquina-fort-in-florida A paper is: Subhash, S.G., Jannotti, P. and Subhash, G., 2015. The Impact Response of Coquina: Unlocking the Mystery Behind the Endurance of the Oldest Fort in the United States. Journal of Dynamic Behavior of Materials, 1(4), pp.397-408. https://link.springer.com/article/10.1007/s40870-015-0035-1 PDF file at: https://www.researchgate.net/publication/283578095_The_Impact_Response_of_Coquina_Unlocking_the_Mystery_Behind_the_Endurance_of_the_Oldest_Fort_in_the_United_States https://www.researchgate.net/profile/Phillip_Jannotti Yours, Paul H.-
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- ball impact
- coquina
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