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Columbia Plateau
The
Columbia Plateau
is a
geologic
and
geographic
region that lies across parts of the
U.S. states
of
Washington
,
Oregon
, and
Idaho
. It is a wide
flood basalt
plateau between the
Cascade Range
and the
Rocky Mountains
, cut through by the
Columbia River
. In one of various usages, the term "
Columbia Basin
" refers to more or less the same area as the Columbia Plateau.
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