Well-known metamorphic rocks are marble and slate. Igneous rocks are made when liquified rock, called magma or lava, cools and solidifies. Well-known igneous rocks are obsidian and granite.

Igneous intrusions are a type of rock feature. They form when molten rock cools below the surface of the Earth. Join Isla and Connor as they explore igneous rock landscape features at Traprain Law ...

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 ...

The object was found at Coto Correa in Las Chapas, a site that has been known since the 1950s, when archaeologists first ...