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Coral or sponge?


Desrosiers1718

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Also found this looks to me like maybe a piece of coral or sponge.   Also found near Palos Verdes CA. 
 

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Probably Monterey Formation banded chert-rich porcellanite:

 

https://gotbooks.miracosta.edu/rocks/sedimentary rocks/25.html

 

See geology map:

https://pubs.usgs.gov/of/2004/1050/Geology.htm

CED01E83-A84A-4B81-BDF1-898A2921FCBB.jpeg

  • I found this Informative 2

My goal is to leave no stone or fossil unturned.   

See my Arizona Paleontology Guide    link  The best single resource for Arizona paleontology anywhere.       

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