There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all fossils are preserved in sedimentary rock. Organisms that live in topographically low places (such ...

Home to the greatest collection of hoodoos—spire-shaped sedimentary rock formations—anywhere in the world, the park is made ...

The basalt which makes up the Giant’s causeway is an igneous rock. Sedimentary rocks are formed by small rock pieces which are transported by rivers and laid down in layers. Chalk is a ...

"The Tonto Group of Grand Canyon holds a treasure trove of sedimentary layers and fossils ... the "Tonto Group", a 0.3-mile-thick collection of five rock formations that are exposed along the ...