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 ...

In the Grand Canyon, the layers of strata are nearly horizontal ... geologic features that cut across strata must have formed after the rocks they cut through (Figures 2 and 3).

"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 ...

Iran's folded rocks are a colorful formation that is part of the Greater Caucasus mountains, which formed when the Eurasian ...

In the Grand Canyon, the layers of strata are nearly horizontal ... geologic features that cut across strata must have formed after the rocks they cut through (Figures 2 and 3).