Definitions
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Examples
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It is more arid, has generally lower elevations, and less pinyon-juniper than the Semiarid Tablelands (22j) to the south or Ecoregion 22n to the east.
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With some similarities to Ecoregion 20c, the Semiarid Tablelands consists of mesas, plateaus, valleys, and canyons formed mostly from flat to gently dipping sedimentary rocks, along with some areas of Tertiary and Quaternary volcanic fields.
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The Semiarid Uplands ecoregion covers disjunct areas across northern Nevada.
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The Semiarid Canadian Breaks ecoregion is similar to the Canadian Breaks (26a) to the east in Texas with its deep valley trough and moderate-relief tablelands, but it is drier.
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The Semiarid Edwards Bajada ecoregion is composed primarily of alluvial fan and slope wash deposits below the escarpment of the Edwards Plateau (30).
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The Semiarid Foothills ecoregion is found between about 5,000 and 8,000 feet elevation.
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The Semiarid Uplands ecoregion includes scattered hills, low mountains, and buttes.
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Semiarid southern slopes support a dry forest association of acacia, royal palm, yucca, cacti, and dry grasses.
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Soils have an aridic, bordering on ustic, moisture regime and receive more moisture during the growing season than the xeric soils of the Semiarid Bear Hills (18d).
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The Semiarid Canadian Breaks ecoregion is similar to Ecoregion 26a to the east with its broad valleys and moderate-relief tablelands, although this region is drier.
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