Transcript Hawaiian Islands - Helena High School

What is a volcano?
An opening in the crust of
the earth that produces hot,
liquid magma, ash, and gas.
Magma is derived from partially
melted rocks from subduction zones
or mantle plumes.
Where do Volcanoes Occur?
1. Convergent boundaries: convergent
oceanic-continental and convergent
oceanic-oceanic.
2. Divergent boundaries: rift valleys and
mid-ocean ridges.
3. Intraplate Volcanism: occurring in areas
within the plate due to hot spots found
under the continents. Ex. Yellowstone
and Hawaii.
Mount Kilauea
Slow-Moving Aa Flow
Pahoehoe (Ropy) Lava Flow