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Can anyone identify these? About an inch in diameter, and inch long, found 1 hr north of san francisco along coast.

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Not worm tubes but similar. I used to find these on the beach in Santa Cruz and I think I learned that they are created by a kind of bivalve. Not likely fossils.

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Thanks. Do you mean the tube that a clam extends to the surface?

I'm just thinking out loud here, but I can imagine something like a geoduck clam producing a cemented accretion around its burrow to the surface.

"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!

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