Geologists have long struggled to understand massive time gaps in Earth’s rock record, where millions—sometimes billions—of ...

It features scenes of farmers tilling soil, majestic mountain roads, sedimentary rock formations, and granite and marble quarries. The film also highlights natural phenomena such as volcanic ...

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 ...

Chalk is a sedimentary rock. Metamorphic rocks are formed when another rock is under heat and pressure. Marble is a metamorphic rock, it is highly decorative and used for statues. Igneous rocks ...