What is meant by the expression “downbuilding”?
What will be an ideal response?
Answer: Downbuilding is the expression sometimes used about sedimentation around passive diapirism, where sedimentary layers are being added as the diapir grows. If our reference is the top of the diapir, which is more or less at the surface (sea bottom), a sedimentary sequence and the source salt layer will build down under the addition of new strata during passive diapirism.
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Undernourishment is most severe in ________ where food production per capita has ________ in the past 50 years
A) Latin America, decreased B) South East Asia, remained fairly constant C) Latin America, increased D) sub-Saharan Africa, remained fairly constant E) North Africa, decreased
Why does oceanic lithosphere subduct under continental lithosphere, whereas continental lithosphere does not subduct under oceanic lithosphere?
a. The oceanic lithosphere contains more water than the continental lithosphere, which floats on top of the oceanic lithosphere. b. The oceanic lithosphere is thinner and less dense than the continental lithosphere, which is thicker and denser. c. Due to mountains and land relief on the continental lithosphere, it is heavier than oceanic lithosphere, pushing it downwards into the mantle. d. The oceanic lithosphere is thinner and denser than the continental lithosphere, which is thicker and less dense. d. The oceanic lithosphere is thinner and denser than the continental lithosphere, which is thicker and less dense.
Follow the geothermal gradient to the depth of 100 km. In which state of matter will peridotite exist at 100 km?
What will be an ideal response?
All transform faults connect two ridge segments.
Answer the following statement true (T) or false (F)