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Modoc Lava Flows and Buttes

Ecoregion in CA

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The Modoc Lava Flows and Buttes ecoregion is a volcanic plateau surrounding the Medicine Lake Highlands of the Cascades ecoregion (4). It is lower and drier than those highlands, with more juniper and pine. Soil temperature regimes are mesic and soil moisture regimes are aridic and xeric. Vegetation includes western juniper, big sagebrush, and native perennial grassland. Water drains down through joints in the basalt rock to the groundwater reservoir, limiting overland flow of water and development of stream channels on the plateau.

— EPA

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