What is the difference between a fault-propagation fold and a fault-bend fold?
What will be an ideal response?
Answer: A fault-propagation fold forms as the fault propagate through an overlying layer so that a ramp forms. Faultpropagation folds move together with the tip. In contrast, a fault-bend fold is stationary at the location of a ramp, and affects rocks as they enter the ramp. Once they leave the ramp they are (technically) unfolded. The exception is the forelimb which is steep and moves with the upper allochthonous unit (Figure 16.17).
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The last 2.6 million years are known as the
A) Jurassic Period. B) Devonian Period. C) Quaternary Period. D) Cretaceous Period.
The largest river in the world is the
A. Amazon B. Mississippi C. Nile D. Congo E. Orinoco
Which of the following are NOT results of post glaciation?
A) V-shaped valleys B) new lakes and streams C) sharp-edged mountain ridges D) U-shaped valleys
Which of the following is a triggering mechanism for mass wasting?
A. Drought B. Slope reduction C. Heavy rain D. Excessive vegetation