IntroductionGreat Basin, semiarid, N section of the Basin and Range province, the intermontane plateau region of W United States and N Mexico. Lying mostly in Nevada and extending into California, Oregon, Idaho, and Utah, it is bordered by the Sierra Nevada on the west, the Columbia Plateau on the north, the Rocky Mts. on the northeast, the Colorado Plateau on the east, and the Mojave Desert on the south.
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