Please help with these geology questions 1. When a megathrust earthquake of magnitude 8 or 9 occurs along the Cascadia Subduction Zone thrust fault, the leading edge of the overriding North American plate ( = the thrust fault hanging wall, typically located underwater) will A. suddenly drop and move inland and eastward toward the North American coast and continent B. suddenly drop and move outward and westward away from the North American coast and continent C. suddenly rise and move inland and eastward toward the coast and continent D. suddenly rise and move outward and westward away from the coast and continent 2. Columnar jointing in solidified lava forms due to A. uniform tensile stresses throughout the flow B. contraction of the cooling lava flow C. progressive step-by-step fracturing from the top and bottom of a cooling flow D. all of these answers are correct
Please help with these geology questions
1. When a megathrust earthquake of magnitude 8 or 9 occurs along the Cascadia Subduction Zone thrust fault, the leading edge of the overriding North American plate ( = the thrust fault hanging wall, typically located underwater) will
A. suddenly drop and move inland and eastward toward the North American coast and continent
B. suddenly drop and move outward and westward away from the North American coast and continent
C. suddenly rise and move inland and eastward toward the coast and continent
D. suddenly rise and move outward and westward away from the coast and continent
2.
Columnar jointing in solidified lava forms due to
A. uniform tensile stresses throughout the flow
B. contraction of the cooling lava flow
C. progressive step-by-step fracturing from the top and bottom of a cooling flow
D. all of these answers are correct
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