Why are ocean fossils found on top of the rocky mountains?

What is an example of a line segment

Giving an address, such as "1000 elysian park avenue, los angeles, .ca, its an example of describing the

This is a 2017 topographic map of puerto rico in the united states, and i'm sorry that people there have suffered such a disaster. i want to ask, what do the yellow dots and areas represent on this graph? and the blue area and the little blue circle, and the little blue sign that looks like a signal tower, what do they stand for?