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Ecological Section Descriptions

The following descriptions are from Ecological Subregions of the United States: Section Descrptions
(McNab and Avers 1994).

Section M331A  Yellowstone Highlands Section M331B  Bighorn Mountains Section 331D  Northwestern Glaciated Plains Section 331E  Northern Glaciated Plains Section 331F  Northwestern Great Plains Section 331G  Powder River Basin Section M332B  Bitterroot Valley

Section M332C  Rocky Mountain Front Section M332D  Belt Mountains Section M332E  Beaverhead Mountains Section M333B  Flathead Valley Section M333C  Northern Rockies Section M333D  Bitterroot Mountains Section 342A  Bighorn Basin

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