Pumice is an example of extrusive igneous rock. The word extrusive means that the magma was forced onto the earth's surface and cooled in a matter of hours. Granite is an example of intrusive ...

Save guides, add subjects and pick up where you left off with your BBC account. Igneous intrusions are a type of rock feature. They form when molten rock cools below the surface of the Earth.

Save guides, add subjects and pick up where you left off with your BBC account. Igneous rocks close igneous rockIgneous rocks are those which have been formed by the cooling and solidification of ...

Unlike most Martian meteorites, which are mainly igneous or mantle rocks, these provide unique insights into Mars’ geologic history. “Micro- to nanoscale microscopy of a unique impact-shocked ...