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US Geological Survey
Geologic Provinces of the United States: Rocky Mountains
The Rocky Mountains are unique among mountain ranges because they are found so far from a coastline. Explore the ideas geologists are proposing to explain the formation of this mountain range.
Curated OER
National Park Service: Rocky Mountain National Park: Geologic Activity
The National Park Service gives information on glaciers during the Bull Lake glaciation period and the Pinedale glaciation period. Find out what happened to these glaciers and what they left behind.