The crust is the outermost layer of the Earth

by Raphael Rogers

The crust is the outermost layer of the Earth, and it is made up of solid rock. The crust is divided into two continental crust and oceanic crust. Continental crust is thicker and less dense than oceanic crust. It is made up of a variety of rocks, including granite, sandstone, and limestone. Oceanic crust is thinner and denser than continental crust. It is made up of basalt, a dark, fine-grained rock. The crust is the only layer of the Earth that is accessible to humans. We can study the crust by drilling into it, by studying rocks that have been brought to the surface by volcanoes, and by studying the ocean floor.

129 pages, Kindle Edition

Published November 12, 2024