1-The Appalachian Mountains in North America were formed by a continent-continent collision in the Paleozoic, and are an example of a(n)…

1-The Appalachian Mountains in North America were formed by a continent-continent collision in the Paleozoic, and are an example of a(n) ________-type orogeny.

a.Andean

b.Cordilleran

c.Alpine

d.Accretionary

2-Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that does not fit the pattern.

a.volcanic arc

b.terrane

c.forearc basin

d.accretionary wedge

3-Which of the below choices supports the concept of crustal uplift?

a.The southern tip of Africa has eroded so thin that it uplifts dramatically because of its isostatic buoyancy.

b.Crust on a subducting continental slab may uplift when its portion within the mantle breaks off the surface portion of the slab, thus decreasing the weight and increasing the buoyancy of the crust at the surface.

c.Seismic tomography has shown a superplume centered below the Himalayas. This is thought to explain the high topography of the area.

d.Seismic tomography has shown a superplume centered below the southern tip of Africa. This is thought to explain the high topography of the area, which consists of an expansive plateau with an elevation of 1500 kilometers.

e.The southern tip of Africa, which has a plateau that is 1500 kilometers in elevation, has been having material added to it over time, increasing its weight. As the weight of Africa’s crust increases, its isostatic buoyancy also increases to balance the crust within the mantle.

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