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Blue Mountain Ecological
Province
The mountainous segment
of northeast Oregon. It is characterized by extensive, very
thick basalt bedrock, groups of rugged mountains, steep canyons,
and extensive ridges and plateaus. Rugged mountains consist
of uplifted granites, basalt, and various metamorphosed shales,
sandstones, limestones, greenstones, and tuffs. Elevations
in Oregon range from about 1,000 feet in the northeast corner
to 9,839 feet on Sacajawea peak in the Eagle Mountains.
Elevations are mainly between 3,000 and 5,000 feet.
Rugged
basaltic foothills.
Typical
view showing interspersed natural grasslands and forest areas.
Managed
natural grasslands.
Typical
pine-fir pinegrass forest.
Looking
south from Hawkins Pass, which is the source of South Fork Imnaha
River.
Information and photos from: Anderson, E.W., Borman,
M.M., and Krueger, W.C. 1998. The ecological provinces of Oregon:
A treatise on the basic ecological geography of the state. Oregon Agricultural Experiment Station. SR 990. Corvallis, Oregon, USA. |