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Really cool fossil but what is it??


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CaraMarie

I found this about 8 years ago in a dried up creek bed behind my house in the hills of Hayward, California in the San Francisco bay area, USA. We dug it out of some dry but soft sediment and I assumed I found a fungus/mushroom of some sort but now Im not so sure.  I am a hobby collector and love it no matter what it is but I would love to have an actual identification. Thanks!

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Edited by CaraMarie
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Al Dente

It’s coral. Maybe someone familiar with the fossils in the area can narrow it down more.

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CaraMarie

That is exactly what I was thinking. As I learned more about fossils I started to doubt my first impression of it. 

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Oxytropidoceras

Fabulous fossil. Thanks for the great pictures.

 

For a specific identifications, you might try contacting:

 

Invertebrate Collections

Museum of Paleontology
University of California
1101 Valley Life Sciences Building
Berkeley, CA 94720-4780

 

The name and contact information for the head of their Invertebrate Collections can be found at https://ucmp.berkeley.edu/contact-ucmp/#whotocontact and https://ucmp.berkeley.edu/people/ashley-dineen/ .

 

Yours,

 

Paul H.

 

 

Edited by Oxytropidoceras
typo
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CaraMarie

Thanks for the info Paul!

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Tidgy's Dad

Nice find. :)

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DPS Ammonite

There are reported corals from the Oakland Hills and marine rocks of Cretaceous to maybe the Miocene.

 

If you PM me the locality, I will try to see what likely rock units via a geological map that the fossil came from.

 

Contact my friend Andrew Alden who has a great website on the Oakland and surround areas geology. He tried to find corals in one of his posts.
 

https://oaklandgeology.com

 


 

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DPS Ammonite

Andrew said contact the UCMP. He thought that the rocks were Cretaceous or Pleistocene with nothing in between. 
 

I think that Cretaceous is a good bet. @HansTheLoser

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abyssunder

If we exclude corallites, I can see why do you think it's a mushroom. :)

Nice specimen!

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HansTheLoser

Thanks for attracting me to this post. It is too young for Cretaceous and I think shallow marine Cretaceous is rare in California. I rather guess Neogene.

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