Rocks – Aggregates of minerals. There are many types. • Igneous – Cooled from a liquid (melt). • Sedimentary – Debris cemented from pre-existing rock. • Metamorphic – Rock altered by pressure and temperature.
Rocks – Aggregates of minerals. There are many types.•Igneous – Cooled from a liquid (melt).•Sedimentary – Debris cemented from pre-existing rock.•Metamorphic – Rock altered by pressure and temperature.