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Fossils

page 5

 

Fossils are evidence of life in the geologic past. They may be as obvious as the bones of an ancient elephant or as obscure as a trail of a worm. When combined with knowledge about current environments and life, they may tell us much about Iowa's geologic past.

 

Paleontologist look for the subtle differences to tell the animals apart. Can you see differences in the teeth of a mammoth and a mastodon?

 

Colonial Coral

Halysites species

Silurian period, Iowa

 

 

 

Brachiopod

Spirifer grime

Mississippian period, Iowa

 

Protozoa, Single Celled

Fusilina specie

Pennsylvanian period, Iowa

 

Trilobite

Calymine Niagarensis

Silurian period, Iowa

 

Horn Coral

Zaphrentis species

Mississippian period, Iowa

 

 

Clam

Allorisma subcuneatus

Pennsylvanian period, Iowa

 

 

 

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