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Ecological Types


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Click to see larger ecotype map of Mount Shasta This map area is characterized by MUDFLOW deposits, ALLUVIAL FANS and DISSECTED volcanic side slopes. The soils are typically deep and highly productive.

The typical forest is a mixed conifer comprised of white fir, ponderosa pine and incense cedar with California black oak. Understory shrubs are greenleaf manzanita and snowbrush. The southeastern slopes of Mount Shasta are forested with white fir stands at elevations above 4500 feet. These dense stands commonly have no understory. At lower elevations the slopes are mostly white fir and ponderosa pine with black oak.

Prominent features in the map area are Intake Spring, Mud Creek Canyon and the Mount Shasta Mudflow Research Natural Area (MSMRNA). MSMRNA was set aside by the Forest Service for scientific research on the development of volcanic soils and vegetation communities. Mud Creek is an is the largest GLACIAL OUTWASH stream on Mount Shasta. It is naturally turbid because it carries a load of glacial silt which is deposits on its floodplain.

Mud Creek on the southeast side of Mount Shasta
Photograph by Peter Van Susteren

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