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 You are here: Home > Natural History > Geology > Geological Processes at Work in Crater Lake National Park

Geological Processes at work in Crater Lake National Park

In this section we highlight the geologic processes affecting rocks within Crater Lake National Park. We provide links to those materials that have documented these processes.

 Geological Processes Affecting Rocks

   Caused by events at the Earth's surface

       A. Weathering (disintegration of rock in place)

            1. Physical

            2. Chemical

       B. Mass wasting (removal by gravity)

            1. Landslides

            2. Mudflows

       C. Erosion

            1. Running water

            2. Groundwater

            3. Waves, currents, tides and tsunami

            4. Wind

            5. Glaciation

   Caused by events inside the Earth

       A. Continental drift - See Geological History section

       B. Volcanism

       C. Earthquakes

 

Look Out Below!

Earl U. Homuth, Nature Notes From Crater Lake, Vol. 1, No. 3, 1928

(Chipmunks trigger landslides within the caldera rim)

 

 

 

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(Image by Grovin Thewer)

 

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