39. The Hawaiian Islands are not formed along tectonic boundaries, but are found in the middle of the Pacific Ocean. As the
image shows, the crust moves over openings in the crust. Magma then moves up through the crust and out to the surface.
Why is the oceanic crust moving?
Subduction moves the crust
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progressive aging of hotspot volcanoes
a
oldest
oceanic crust
sub-oceanic mantle
plate motion direction
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active
magma
from
deep
source
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