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Goat Rocks
Goat Rocks
is an
extinct
stratovolcano
in the
Cascade Range
, located between
Mount Rainier
and
Mount Adams
in southern
Washington
, in the United States. Part of the
Cascade Volcanoes
, it was formed by the
subduction
of the
Juan de Fuca Plate
under the western edge of the
North American Plate
. The volcano was
active
from 3.2 million years ago until eruptions ceased between 1 and 0.5 million years ago. Throughout its complex eruptive history, volcanism shifted from
silicic
explosive eruptions
to voluminous,
mafic
activity.
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