During orogeny, what kinds of igneous activity can occur?
a. At transform boundaries, melting may take place where deep portions of the crust undergo heating
b. In convergent plate boundaries, melting takes place in the mantle above the subducting plate
c. In rifts, stretching and thinning of lithosphere causes decompression melting (i.e.,
melting due to the decrease of pressure) of the mantle
d. During continental collision, melting may take place where deep portions of the crust undergo heating
e. Both b, c, and d
Ans: e. Both b, c, and d
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