The rocky mountains formed when the Pacific plate collided with the North American plate. What is the process

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.

segmented body, an exoskeleton made from chitin, and joint appendages.