Location:

Calvert Cliffs of MD

~ 22-8 Million Years Old
Early to Middle Miocene
Chesapeake Group: Calvert, Choptank, and St. Mary's Formations

On one snorkel trip, a large (~3 foot) cownosed ray came right up to us, and swam around for a while. In this image, you can see its "wingtips" sticking out of the water. Usually they flee when they see some one aproaching. It was a pleasant surprise when it did not immediately flee.