Cretaceous period Related Content

Rudist Reefs
Dec 4 2009 - 3:25pm
About 100 million years ago, during the heyday of the dinosaurs, reefs were built by mollusks called rudist clams. They looked very different from today's coral reefs.
Rudist Clams
Jan 26 2010 - 11:45am
Rudist clams are mollusks that went extinct about 65 million years ago. They were the reef builders of the Cretaceous Period, the heyday of the dinosaurs. Today corals have taken over the role rudists once filled.