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Eastern Gravelly Mountains

Ecoregion in Beaverhead NF, Rocky Mountains in MT

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The glaciated Eastern Gravelly Mountains ecoregion has subdued, pothole-studded terrain and is mostly forested. Climax vegetation is mapped as subalpine fir and Douglas-fir forests. Barrens occur; they are more extensive than in the wetter Absaroka, Madison, and Gallatin ranges to the east but less widespread than in the Barren Mountains (17e). Ecoregion 17d is underlain by a variety of rocks. Its core consists of folded and faulted, generally carbonate-rich, Mesozoic and Paleozoic sedimentary rocks whereas lower slopes are underlain by Precambrian pre-Belt metamorphic and metasedimentary rocks and Tertiary rhyolite. Grazing and logging are the common land uses.

— EPA

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