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Fossilizable

Hello! Here are several photos of a fossilized colony of some sort of worm, or so it appears to me. Please excuse the remnants of clear nail polish I used years ago to increase contrast before I knew better. I came across this in Santa Paula canyon about 2 miles northwest of highway 150 where it turns west at Thomas Aquinas College, Santa Paula, CA. It had washed down decades ago from probably a Matilija Formation exposure. The matrix grain seems quite fine and the rock is very heavy. Although I've been up and down the creek countless times, I've never seen the source bed. Eocene oysters, clams and echinoderms have been collected in the canyon. Thanks for your help.

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Edited by Fossilizable
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Fossilizable

I'm thinking these are large Siboglinidae, to be more precise.

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westcoast

You could be right. Can you get sharper images of the surface textures of the tubes? 

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Fossilizable

I hope these are a little more helpful. Just a few more thoughts:

  • The tube structure is smooth and uniform.
  • From one or two sites on the rock there appear to be double walls delaminating somewhat (as in the last photo).
  • These tubes were originally flexible not rigid.

This article looks promising: https://www.researchgate.net/publication/322107612

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