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Ecological Sections:
Southern California Mountains and Valleys Subsection M262Bk Perris Valley and Hills
Lithology and Stratigraphy. This subsection contains mostly Mesozoic granitic, gabbroic, marine (Jurassic) sedimentary, and metavolcanic rocks in the hills. The valleys are filled with Quaternary alluvium.
Vegetation. The predominant natural plant communities are California sagebrush - California buckwheat series and Needlegrass grasslands. There is some Black sage series and small areas of Coast live oak series and Chamise series.
Vernal pools: San Jacinto Valley vernal pools. Grasslands: California annual grassland series, Foothill needlegrass series, Nodding needlegrass series, Saltgrass series. Shrublands: Bush seepweed series, California buckwheat series, California buckwheat - white sage series, California sagebrush series, California sagebrush - California buckwheat series, Chamise - hoaryleaf ceanothus series, Chamise - white sage series, Fourwing saltbush series, Mixed saltbush series, Scalebroom series, Scrub oak series, White sage series. Forests and woodlands: Birchleaf mountain-mahogany series, California juniper series, Coast live oak series. Surface Water. Runoff is rapid, except from floodplains and lake basins. All but the larger streams are dry through the summer. There are sag ponds along the Elsinore Fault Zone, Lake Elsinore being the largest. Also, there are several reservoirs in the subsection. < previous - Southern California Mountains and Valleys - next > |
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