I learned something new today...

...about Coquina (pronounced "Koh-kee-nah") rocks. They're found by the sea, comprised of shells that have been broken down and mashed together over time. So, essentially, it's a type of petrification, except that they're already composed of hard, rock-like materials.

Oh, I suppose that Wikepedia could do a better job.

So, just enjoy the pictures:)