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Flint Creek-Anaconda Mountains

Ecoregion in Deerlodge NF, Rocky Mountains in MT

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The forested Flint Creek-Anaconda Mountains ecoregion lies west of the Continental Divide and is underlain primarily by Tertiary igneous rocks and Mesozoic sedimentary rocks in contrast to neighboring Ecoregion 17x that is dominated by Precambrian Belt rocks. Characteristically, it was glaciated and both drift and lakes are much more common than in Rattlesnake-Blackfoot-South Swan-Northern Garnet-Sapphire Mountains (17x), the Elkhorn Mountains-Boulder Batholith (17ai), or the Southern Garnet Sedimentary-Volcanic Mountains (17al). The climax vegetation is mapped as subalpine fir and Douglas-fir forests and is distinct from the Douglas-fir and ponderosa pine forests of nearby Ecoregion 17al. Logging, grazing, mining, recreation, wildlife habitat, watershed, and rural residential development are the primary land uses. Airborne smelter pollution has affected the condition of the vegetation.

— EPA

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