Here's a breakdown:
* Organic: Meaning it's formed from the remains of living organisms.
* Sedimentary: Meaning it's formed from sediment (in this case, shells) that has been deposited and cemented together.
* Cemented shells: The shells are held together by a mineral cement, often calcite or silica.
Coquina is often found in coastal areas where seashells accumulate. It can range in color from white to gray to reddish-brown, depending on the type of shell and cementing material.
