About 100 million years ago, during the heyday of the dinosaurs, reefs were built...
Fri, 12/04/2009 - 14:25
Sediment Core Close-Up
These deep-sea sediment cores were drilled from beneath the seafloor, and hold...
These "elevator" rudists, an ancient bivalve, used one long heavy valve to anchor...
Where ocean currents were strong, ancient rudist “recliners” lay unattached on...
Rudist clams are mollusks that went extinct about 65 million years ago. They were...