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McKinnan Gulch
McKinnan
Gulch
is a
valley
in
Marin County, California
,
United States
.
It
contains
a small
stream
which descends the
western
slope
of the
Bolinas Ridge
and
drains
into
Bolinas Lagoon
.
Near the
head
of the
gulch
is an
ore vein
containing
chalcopyrite
,
galena
,
pyrite
, and
calcite
.