Rehabilitation of Highway 62 West, Crater Lake National Park, Klamath County, Oregon
SOILS AND GEOLOGY
This section describes the existing soils and geology along the project corridor.
The geology of the Highway 62 West corridor is volcanic, largely resulting from activity associated with the Mt. Mazama eruptions. This volcano released andesitic lava and ash flows that were later covered by ash, pumice, and cinders from subsequent eruptions (Warfield et al. 1999). Much of the Highway 62 West corridor geology represents ashfall and ashflow deposits with some residuum and colluvium present (NRCS 2002).