havasumike
starting to shine!
Member since May 2016
Posts: 41 
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Post by havasumike on Aug 8, 2016 21:14:32 GMT -5
I found this grapefruit sized rock in the rock used to landscape our yard. People like to use the desert varnished rock for their yards or slopes. This was several years before our interest in rocks and I thought it looked like a geode. So I banged it on another rock and luckily it split down the middle.   When I saw this I thought "It's a geode!". Well now years later I was looking at it thinking I guess this is what you call a nodule. I decided to see if I could polish the face of both pieces and picked it up and saw this.   So, I guess I've had a clam fossil all along. |
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Post by jakesrocks on Aug 9, 2016 9:24:32 GMT -5
Not a clam. It's one of the hundreds of types of fossil coral.
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havasumike
starting to shine!
Member since May 2016
Posts: 41
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Post by havasumike on Aug 9, 2016 11:27:18 GMT -5
Not a clam. It's one of the hundreds of types of fossil coral. Thank you Don! I guessed clam from the way the inside looks. |
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Post by rockpickerforever on Aug 9, 2016 12:12:13 GMT -5
Was going to chime in and agree with Don. Not a clam, but a coral!
Since a huge section of the SoCal/AZ desert was at one time a shallow sea, it is a treasure trove of sea fossils. Have picked up a lot of various fossilized corals in the Ocotillo Wells area, as well in an area known to us as "Potholes" (mining claim owned by our prospecting club) northwest of Yuma.
Here's a few pics of corals from the desert
These in particular look a lot like yours
A few cabs made from them. They are hard and take a nice shine! 
Don't want to usurp your thread, but here are a few albums of photos to show you the variety of fossils that can be found out there. link to Potholes Rocks
link to Potholes Fossils
link to CA Desert Corals
Enjoy your hunting!! Jean
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havasumike
starting to shine!
Member since May 2016
Posts: 41
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Post by havasumike on Aug 9, 2016 12:58:48 GMT -5
Thank you Jean. This is all new to us and welcome any input, advice or anything else. It's starting to make more sense for the things we are finding (thanks to everyone's help). We also see a lot of things that look like cement inside and have an outer coating of Jasper? Some are obviously mollusks, while others are more round with flat bottoms.
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Post by tims on Aug 9, 2016 13:33:12 GMT -5
Yours sure looks oyster-y inside Mike, that's a pretty piece. Rockpicker's bucket helped me ID a few mysteries of my own.
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