Over time, the layers are compressed and glued together.Metamorphic rocks are formed from other rocks, igneous or sedimentary, which are heated and compressed underground.Igneous rocks are formed ...

"Scroll Down through History" displays the layers of rock exposed within the Grand Canyon and shows when in earth's history they formed. The region where the Grand Canyon now lies begins to shift ...

The rocks are formed of countless sedimentary layers, which were upturned and creased into the landscape we see today during the initial collision between the Arabian and Eurasian tectonic plates. The ...

The rocks are formed of countless sedimentary layers, which were upturned and creased into the landscape we see today during the initial collision between the Arabian and Eurasian tectonic plates.