Rocks

A mixture of one or more minerals, mineraloids, glass, or organic matter

The Rock Cycle

Magma is molten material that hardens to form igneous rocks

Intrusive igneous rocks form when magma cools below the Earths surface.

Extrusive igneous rocks form when lava cools at the Earths surface.

Basaltic rocks are heavy, dark, and dense.

Granatic rocks are light colored,

Adesitic Rocks are intermediate between basaltics and granitcs

When heat and pressure increases, metamorphic rocks form

Slate gneiss are foliated or banded metamorphic.

Sedimentary rocks form when fragments of rocks, minerals, and or organic materials are compacted and cemented together.