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Limy Foothill Savanna

Ecoregion on Great Plains, MT

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The Limy Foothill Savanna ecoregion lies east of the Continental Divide and slopes from the forested Big Snowy-Little Belt Carbonate Mountains (17q) to the grassy foothills and plains below. Characteristically, Ecoregion 17t is dissected by mountain-fed streams and is covered by a forest-grassland complex. It is underlain by Mesozoic and Paleozoic sedimentary rocks that are rich in carbonates unlike those of the Foothill Grassland (42r) and Montana Central Grasslands (43n). Elevations range from about 4,000 to 7,000 feet and lie between those of the lower, drier plains below and the higher, wetter mountains above. The Limy Foothill Savanna (17t) has more available moisture and, correspondingly, a different potential natural vegetation than the nearby Limy Foothill Grassland (43u). Grazing, gravel quarrying, and logging are the common land uses.

— EPA

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