Page 87 - Laboratory Manual in Physical Geology

F. REFLECT & DISCUSS Examine this cross section of a plate boundary.

1. What kind of plate boundary is this?

2. Name the specific process that led to the formation of magma in this cross section.

3. Describe the sequence of plate tectonic and magma generating processes that led to formation of the volcanoes
(continental volcanic arc) in this cross section.

Oceanic
Volcanic
arc trench

Oceanic crust
Continental
crust

Lithosphere Lithosphere
Asthenosphere Asthenosphere

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