The southern half of the state was covered by a shallow sea.

By 20Ma the land west of the ranges was a shallow sea.

The state was covered by a warm shallow sea at the time.

Formation of the stone began 450 million years ago when the local area was covered by a shallow sea.

They are adapted to living on land and in shallow seas.

All of southern Florida was covered by a shallow sea.

These would have been laid down some 200 million years ago in a shallow sea.

During the early part of the era the state was covered by a warm shallow sea.

Evidence of marine life in the area points to a time period when the land was covered by a shallow sea.

I may have been on the floor of a wide shallow sea, cool and still.