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The
Lewis
and
Clark
Expedition
was
the
first
of
many
government
surveys
of
natural
resources
in
the
American
West,
a
task
taken
over
in
later
years
by
the
United
States
Geological
Survey
(USGS).
The
discussion
includes
the
early
surveys
of
the
West
(by
King,
Powell,
Hayden,
and
Wheeler)
and
their
relation
to
the
USGS
mission.
There
is
also
a
page
devoted
to
scientific
discoveries
made
by
Lewis
and
...
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