Jump to content

Crepidula Princeps - Purissima Formation - Half-Moon Bay


hor2cultcha

Recommended Posts

I found this piece on the beach many years ago. it's pretty cool. a paleontologist friend told me that the bottom, largest shell belongs to the female and when she died, the next male changed sexes to become the female.

more shots here:

http://flic.kr/s/aHsjwKwdfT

post-7356-0-42449300-1321835114_thumb.jpg

Edited by hor2cultcha
Link to comment
Share on other sites

Thats pretty freaky looking. So tell us some more about it.

Bulldozers and dirt Bulldozers and dirt
behind the trailer, my desert
Them red clay piles are heaven on earth
I get my rocks off, bulldozers and dirt

Patterson Hood; Drive-By Truckers

 

image.png.0c956e87cee523facebb6947cb34e842.png May 2016  MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160.png.b42a25e3438348310ba19ce6852f50c1.png May 2012 IPFOTM5.png.fb4f2a268e315c58c5980ed865b39e1f.png.1721b8912c45105152ac70b0ae8303c3.png.2b6263683ee32421d97e7fa481bd418a.pngAug 2013, May 2016, Apr 2020 VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png.af5065d0585e85f4accd8b291bf0cc2e.png.72a83362710033c9bdc8510be7454b66.png.9171036128e7f95de57b6a0f03c491da.png Oct 2022

Link to comment
Share on other sites

Hey hor2cultcha, nice find - it looks a bit waterworn. I take it you found this as a cobble? Also, did you get my message?

Link to comment
Share on other sites

hi boesse. no i didn't, but notice you are from close by me. please resend. i get a lot of email and sometimes things fall 'tween the cracks'.

Link to comment
Share on other sites

C. princeps is the signature species of the Purissima Formation - and they are usually soft and crumbly, but this piece is solid as a ....! the formation follows the coast of california from big sur to point reyes - pretty much the central part of the state. it's around 4-5 million years old. i find a lot of whale bones in there too. i was told that this is a very rare complete colony. i've only seen partial ones in the collections i looked at. i found it in the surf zone, so assume that it is a cobble[?]. the piece is 3.5" x 2.5" and 2.5" deep. i also found a fossilized horse [?] tooth on that beach, but lost it many years ago.

Link to comment
Share on other sites

That's a very cool fossil; X2 for the interesting life history story!

"There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant

“Try to learn something about everything and everything about something.” - Thomas Henry Huxley

>Paleontology is an evolving science.

>May your wonders never cease!

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...