A(n) ____ is a very large column of superheated mantle that originates at the boundary of the core and
mantle.
a. Volcano
b. Plume
c. Asthenosphere
d. Ridge
ANS: B
A mantle plume is a large column of superheated mantle. The largest of these plumes are known as
superplumes. There is a superplume that lifts all of Africa. These are mediums for heat from the core
and are thought to resupply the asthenosphere. Information can be found in the section The
Confirmation of Plate Tectonics.
You might also like to view...
What may result from transportation and deposition?
A) weathering and erosion B) cooling and crystallization C) fragments become sediments D) precipitation and lithification
What enhances the ocean's buffering capacity?
a. The amount of dissolved inorganic carbon present b. The amount of acid already present in the ocean c. The amount of dissolved organic compounds d. The amount of calcium
What are gymnosperms, and why was their evolution important? What will be an ideal response?
Which sediment size has the steepest angle of repose?
A) Gravel B) Sand C) Silt D) Clay