Wayside: Ammonite

As the world changes, organisms have three options: Adapt, Move, or Die. Ammonites chose the third.

NPS Photo / Serena Rosales

Quick Facts

Location:

Interior, SD

Significance:

The fossil record shows that ammonites were unable to survive a changing climate.

Amenities

2 listed

Historical/Interpretive Information/Exhibits, Tactile Exhibit

Under the Sea 

Ammonite fossils found in the park are evidence that this area was under water 75 million years ago. Some ammonites could grow to more than three feet across and served as a food source for giant mosasaurs and other predators.