What is cleavage refraction and how can we explain it?
What will be an ideal response?
Answer: Cleavage refraction is the symmetric fanning of cleavage associated with folds in layers with contrasting competence. A way of explaining this is that incompetent layers experience (more) flexural slip that rotates the cleavage in these layers during folding.
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What is particularly troublesome about the practice of mountaintop removal for mining coal in the mountains of West Virginia?
A. Dumping of waste rock in the surrounding valleys B. Land subsidence C. Cave-ins D. Gas explosions
Which item is not considered to have a basic pH?
a. baking soda b. household ammonia c. black coffee d. seawater e. bleach
List the major bodies of water for the Latin American region:
Evidence supporting the hypothesis of continental drift
What will be an ideal response?