The major place where grantic continental crust is manufactured is.pdf

The major place where grantic continental crust is manufactured is
a. Over hot spots
b. In rift valleys
c. At convergent margins
d. It was apparently all produced billions of years ago and is not produced under the present
conditions of Earth
Solution
Answer is A. Materials are also added to continental crust through intrusive and extrusive
igneous activity. Plumes of magma from the Earth\'s asthenosphere are generated from the
friction produced at the contact zone where oceanic crust slides past continental crust. These
plumes then rise upward into continental crust to form granitic plutons or a variety of volcanic
features on the Earth\'s surface. A pluton can be defined as any igneous intrusion of rock that
forms a kilometre or more below the Earth\'s surface..

1. The major place where grantic continental crust is manufactured is
a. Over hot spots
b. In rift valleys
c. At convergent margins
d. It was apparently all produced billions of years ago and is not produced under the present
conditions of Earth

Solution

Answer is A. Materials are also added to continental crust through intrusive and extrusive
igneous activity. Plumes of magma from the Earth\'s asthenosphere are generated from the
friction produced at the contact zone where oceanic crust slides past continental crust. These
plumes then rise upward into continental crust to form granitic plutons or a variety of volcanic
features on the Earth\'s surface. A pluton can be defined as any igneous intrusion of rock that
forms a kilometre or more below the Earth\'s surface.