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Pine Scoria Hills

Ecoregion on Great Plains in MT, WY

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The Pine Scoria Hills ecoregion is characterized by wooded, rugged, broken land and stony hills. Alluvium and rocky, gravelly colluvium are common. Soils are often poorly developed. In high areas, open ponderosa pine-Rocky Mountain juniper forests grow and have a heavy understory of grasses while, in drier areas, ponderosa pine savanna is found. Stock carrying capacity is low due to rough terrain and lack of water.

— EPA

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