The geologic history of Glacier National Park is read in the numerous exposed layers of
Precambrian sedimentary formations. These extremely well preserved sediments date back
to over 1 billion years. Subsequent sculpting by massive bodies of ice has transformed
this area into a dramatic example of glacial landforms.

Today several small alpine glaciers of relatively recent origin dot the mountains. Due
to its geographic location and geologic history, Glacier National Park contains a
particularly rich biological diversity of plant and animal species. This combination of
spectacular scenery, diverse flora and fauna, and relative isolation from major population
centers have combined to make Glacier National Park the center of one of the largest and most
intact ecosystems in North America.
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