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WEATHER
Tobacco Plains
Ecoregion
in
Rocky Mountains
,
MT
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The treeless Tobacco Plains ecoregion lies to the west of the Canadian Rockies (41) in the Rocky Mountain Trench at an elevation of 2,600 to 4,000 feet. The ecoregion is covered by Quaternary drift, lacustrine, and alluvial deposits. It contains lakes and the only extensive drumlin field in Montana. The Tobacco Plains (15d) is physiographically distinct from the higher and more rugged Western Canadian Rockies (41c) and Salish Mountains (15l). Xeric and Frigid Haploxerolls, Haploborolls, Xeropsamments, and Xerochrepts are common; these soils are rare in the surrounding, mountainous ecoregions. Climax vegetation is foothill grassland and contrasts with the subalpine fir, Douglas-fir, grand fir, and Engelmann spruce forests of Ecoregions 15l and 41c. Lumber mills, sand and gravel operations, grazing, and residential-commercial activity occur; the land use mosaic is distinct from that of Ecoregions 15l, 15t, and 41c which are dominated by logging and forest recreation.
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