What is the annual rainfall in the tall grassland areas?

What part did glaciers play in forming the great lakes?

Stone mountain was formed during the formation of the blue ridge mountains around 300-350 million years ago and is considered part of the appalachian mountains. it formed as a result of the upwelling of magma from within the earth's crust. this upwelling, or solidified to form the that became stone mountain.

In the diagram below dab and dac are adjacent angles