sjvalleyhunter
Silver Member
- Joined
- May 5, 2014
- Messages
- 3,717
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- Location
- Central California
- Detector(s) used
- Minelab E-Trac and Whites MXT
- Primary Interest:
- Metal Detecting
- #1
Thread Owner
Yesterday I took the short drive to the Northern California coast to do a little halibut and stripped bass fishing. Unfortunately I was skunked, but as I was walking along the surf break I saw what appeared to be a rock protruding from the sand. I could see some shells and other things embedded in it, so I dug it out and threw it in my pack.
After getting back home I rinsed it off and could see numerous broken clam shells and barnacles in it. I know absolutely zero about fossils, so I will ask you folks as to your opinions. Is this a piece of concrete or other man-made material that shells and other stuff was added to it, perhaps to increase its strength, or is it a natural formed rock that incorporated clam shells and other sea creatures into it over the years?
I’ve tried to take the clearest pictures possible, and also wet the “rock” to help bring out the details. Thanks for looking.










After getting back home I rinsed it off and could see numerous broken clam shells and barnacles in it. I know absolutely zero about fossils, so I will ask you folks as to your opinions. Is this a piece of concrete or other man-made material that shells and other stuff was added to it, perhaps to increase its strength, or is it a natural formed rock that incorporated clam shells and other sea creatures into it over the years?
I’ve tried to take the clearest pictures possible, and also wet the “rock” to help bring out the details. Thanks for looking.









