What unusual objects are found with coquina?

Coquina appears to be made out of compressed sea shells. The Spanish word for shells is "coquina." Over time, the mixing of salt water with a rare type of limestone and the exposure to ocean creatures all joined together to become one of the most interesting and oldest concrete products used in the United States.

Asked by Jennifer Sinclair · Last updated 5 years ago · 17.3K views · SOURCE