Landforms
uniquely demonstrate the balance between internal and external forces
acting on the earth. Sedimentary processes such as weathering,
erosion and deposition coupled with mass wasting tend to level the
earth’s surface. Mountains give testimony to the deep-rooted
dynamic processes that overcome this relentless wearing down that
occurs over time. The motions of the earth’s lithosphere and the
resulting deformation along with volcanism are the underpinnings of the
dynamic forces building mountains.
Mountain Building
from:
Fundamentals of Physical Geography
Michael Pidwirny
Okanogan University College
http://www.physicalgeography.net/fundamentals/10k.html
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