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)
