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Hi All! Wondering what's in this rock? Fossilized worm burrows? Not fossils at all?

Spark

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Spark Newbie

Spark

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This is a 55lb rock my family found in a stream bed on a local hike in Southern California. Any idea what we've got?

 

We are speculating some of the shapes look like worm burrows?

 

Any information would be greatly appreciated! Thank you!

IMG_1227.jpg

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DPS Ammonite Regular Member

DPS Ammonite

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Welcome to the Forum. They look like cross sections of bivalves.  Any idea of the formation and locality that they are found in?

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Fossildude19 Regular Member

Fossildude19

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I agree - cross sections of bivalves, & maybe other shells.

 

Southern California is a big area.
Any chance of narrowing it down to county or city?

 

 

Geologic_map_California.jpg

    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

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Spark Newbie

Spark

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Thanks to you both. The specimen was found wedged  into the side of  a stream bed in the Santa Monica mountains, specifically in the Pacific Palisades, Santa Ynez canyon

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abyssunder Regular Member

abyssunder

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Maybe there are rudist fragments/valves.

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Fossildude19 Regular Member

Fossildude19

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geology stynz.JPG

    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."
John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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abyssunder Regular Member

abyssunder

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Which kind of bivalves have continuous rounded walls in transverse or oblique section?

Here are some rudist valves in cross section in limestone, for comparative reason:

Df5MJp8XkAA5A9H.thumb.jpeg.a8d795699ae6044e48c62291387e983c.jpeg

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" We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. "

Thomas Mann

My Library

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Paleorunner Regular Member

Paleorunner

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When I looked at the rock, I did not know what I was seeing, but it seemed very strange to me, that with so much fragment there would not be one sufficiently preserved to affirm that it is a bivalve. :zzzzscratchchin:

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Fossildude19 Regular Member

Fossildude19

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As I stated, there may be other shells mixed in - gastropods, for one.

    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."
John Muir ~ ~ ~ ~   ><))))( *>  About Me      

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