Ryan took notes in class about a type of mountain, but forgot to write which mountain his notes match. Here is what he wrote: “swelling causes rock layers to break into sections with a gentle slope on one side and a steep escarpment on the opposite side, leaving vertical rock faces between the breaks in the blocks.” Which type of mountain do his notes refer to?
a. lifted fault block mountains
b. ocean ridges
c. folded mountains
d. tilted fault block mountains