Which of the following is an example of a continental volcanic arc?
A) Cascade Volcanoes
B) Hawaiian Volcanoes
C) Aleutian Volcanoes
D) Icelandic Volcanoes
Question 2
If a back-arc basin is a region related to a subduction zone, how can such an extensional basin form near a boundary defined by compression?
A) Trench rolls back as the old, dense subducting plate sinks.
B) Compression ceases before extension takes over.
C) Rising magma is softening the crust, allowing it to stretch.
D) A plate subducting at an extremely shallow angle is pushing against the back-arc region.
Shield Volcanoes of the Big Island of Hawaii
Volcanoes eject reflective aerosols into the atmosphere
Active Continental Margins
Shiprock, New Mexico – a volcanic neck
The 1980 Mount Saint Helens eruption obliterated the community at the base of this Cascade volcano.
Effects of Continental Drift