The relatively young mountains along the western margins of North and South American plates are referred to as the
A) Cordilleran system.
B) Eurasian-Himalayan system.
C) Alleghany orogeny.
D) Sierra Nevadan orogeny.
Question 2
Which of the following shows the general sequency of an orogeny?
A) thickening of crust through accretion or magma intrusionupliftweat hering and/or erosion
B) upliftthickening of crust through accretion or magma intrusionweathering and/or erosion
C) weathering and/or erosionupliftthicke ning of crust through accretion or magma intrusion
D) thickening of crust through accretion or magma intrusionweathering and/or erosionuplift
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