General Awareness Questions

Q.  Extrusive volcanoes are not found in which one of the following mountains?

a. Alaska
b. Rocky
c. Andes
d. Himalayas


ANSWER: See Answer
 
Volcanic mountains are very common along the destructive plate boundaries i.e. Oceanic-continental plate boundaries which are yet uncovered in the rock folded mountains formed due to continental –to continental plate collision. The Himalayas are also a plate-to-plate collision tectonic boundary. In this case, the Indian Plate [of the Indian Subcontinent] is colliding head-on with the Eurasian Plate. Both plates are comprised of continental lithospheric crust, so there is no appreciable distinction in density.
 

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