Explain the formation of an extensional fault set that overprints earlier extensional faults formed during the same extensional phase.
What will be an ideal response?
Answer: This is shown in Figure 17.4, and the explanation is that a new set of faults form if the original set of extensional faults rotate out of the sector where slip is feasible. Slip on faults becomes infeasible when the shear stress becomes low enough that it requires less stress to form new (and steeper) faults. The critical angle would depend on a balance between rock strength and the strength of the rotating faults.
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Compare and contrast the main features of a hurricane with those of a strong middle-latitude cyclone.
What will be an ideal response?
Which one of the following best describes a flux?
A) Movement of elements or compounds between reservoirs in a biogeochemical cycle B) A type of flower used for food and fiber; also known as linseed C) Variation in output from a large water reservoir, such as output through a hydroelectric dam D) A pool or reservoir where an element or compound is stored within a biogeochemical cycle
Mafic rocks contain about ________% silica.
A. 50 B. 10 C. 80 D. 25 E. 65
Valleys that lead from the continental shelf into deeper waters are known as ________
Fill in the blank(s) with correct word