During the Late Cretaceous Period, much of what is now North America was covered by a shallow, warm water sea – known as the Western Interior Seaway. This sea teemed with life and one of the most notable inhabitants was the ammonite. Ammonites are extinct creatures that are related to squid, cuttlefish and the chambered nautilus. Ammonites, such as this, that are recovered from the 70 to 75 million year old Bear Paw Shale, shine with particular brilliance in hues of red, green and yellow.
The Children's Museum of Indianapolis
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Marine animals, Fossil
Paleontology -- Cretaceous
Further information on this record can be found at its source.