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Black Canyon of the Colorado
The
Black Canyon of the Colorado
is the
canyon
on the
Colorado River
where
Hoover Dam
was built. The canyon is located on the Colorado River at the state line between
Nevada
and
Arizona
. The western wall of the gorge is in the
El Dorado Mountains
, and the eastern wall is in the
Black Mountains of Arizona
. The canyon formed about 15 million years ago during the
Miocene
Basin and Range
uplift. Black Canyon gets its name from the black
volcanic rocks
that are found throughout the area.
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