Throwback to my first ever fossil crab prep from a concretion - it's around 12 million years old | Mamlambo

A 6' wide Concretion protruding from a cliff 30' over the creekbeed. Sent the drone for a look. Many Concretions have lines in them that makes it look like they spin in place wearing grooves in the outer shell. You can see them on the lower portion of this Concretion. DJI mini2 drone. #education #concretions #Ohio #fossilhunting #educational #creekside #nature #fossils | Ohio History Hunter

I believe this is most likely a concretion but calling it a dragon's eye definitely sounds much more exciting! #dragons #caves #Tennessee | TAG Caver

A small fossil fish vertebra in a huge concretion #fossils #fish | Mamlambo

While diving in uncharted territory the team uncovers a piece of concretion with big secrets buried in it. | HISTORY

Check out this cool fossil concretion with me. Concretions are formed where organic matter gets buried in sediment and the minerals from the thing harden the rock around it concentrically! An now you know! There could be remnants of a fossil in there! #fossil #fossilhunter #fossils | Rock Your World: Rock Shop, Jewelry Studio, Online Boutique & Guided Tours