Blue Mountains

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The Blue Mountains ecoregion is a complex of mountain ranges that are generally lower and more open than the neighboring Cascades (4), Northern Rockies (15), and the Idaho Batholith (16) ecoregions. Like the Cascades, but unlike the Northern Rockies, the region is mostly volcanic in origin. Only the few higher ranges, particularly the Wallowa and Elkhorn Mountains, consist of granitic intrusive and metamorphic rocks that rise above the dissected lava surface of the region. Unlike the bulk of the Cascades, Idaho Batholith, and Northern Rockies, much of this ecoregion is grazed by cattle. (US Environmental Protection Agency, 2013)


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Blue Mountains

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References

US Environmental Protection Agency. 2013. Primary distinguishing characteristics of level iii ecoregions of the continental united states. https://www.epa.gov/eco-research/level-iii-and-iv-ecoregions-continental-united-states