Volcanic island arcs- also called island arcs
-those that develop within the ocean and grow large enough for their top to rise above the surface
-Dominated by the eruption of fluid basalts that build numerous shieldlike structures on the ocean floor
Continental Volcanic arc-produced by slabs of oceanic lithosphere subducted under continental lithosphere
-continental crust is thicker + higher silica
Intraplate Igneous Activity
Mantle Plum- ascends toward the surface
-responsible for vast outspourings of basaltic lava that create large basalt plateaus
-appear to form deep within the earths core
-sold rock that rises to the surface
Hot Spot- Magma that triggers volcanism at the surface
-more than 40 have been identified
Volcanic island arcs- also called island arcs
-those that develop within the ocean and grow large enough for their top to rise above the surface
-Dominated by the eruption of fluid basalts that build numerous shieldlike structures on the ocean floor
Continental Volcanic arc-produced by slabs of oceanic lithosphere subducted under continental lithosphere
-continental crust is thicker + higher silica
Intraplate Igneous Activity
Mantle Plum- ascends toward the surface
-responsible for vast outspourings of basaltic lava that create large basalt plateaus
-appear to form deep within the earths core
-sold rock that rises to the surface
Hot Spot- Magma that triggers volcanism at the surface
-more than 40 have been identified