2.) Ammonites are still in the ocean today.
Ammonites were related to marine mollusks including the octopus, squid and pearly nautilus – a group called cephalopods. They became extinct at the end of the Cretaceous Period. They are identified by the squiggly pattern (sutures) that separates one chamber from the next. Ammonites are known from as early as Devonian Period.
This ammonite is polished to show the suture pattern – complex, isn’t it?
Late Cretaceous Period
This ammonite is cut in half and polished to show the chambers.
Photograph from Dr. Jack Hankla’s “More than Dinosaurs” exhibit
at the Falls of the Ohio State Park Interpretive Center in 2004.
Use Back Arrow to Return to Quiz or Click Here
Created January 25, 2011, Updated July 26, 2011