Calcite is the predominant mineral in warm, shallow marine environments.

They were dominantly deposited in a deltaic to shallow marine environment.

It was widespread in shallow marine environments during the Paleozoic.

I am not sure which is his greater achievement, getting the film made in such a shallow and hostile environment or making so remarkable a movie.

The nodules formed in a shallow marine environment along with abundant plant material.

Often, a distinction is made between deep and shallow marine environments.

Normally phosphates are deposited in very shallow, near shore marine or low energy environments.

This shallow marine environment is home to the endangered manatee.

Eurypterus were most probably marine animals, as their remains are mostly found in intertidal shallow environments.

In the Oligocene the land subsided, creating a shallow, warm marine environment.