Igneous
Rocks - formed from the crystalization and solidification of molten
earth materials (magma).
Sedementry
Rocks - formed from the consolidated pieces of weathered and eroded
materials - includes precipitation from water or cool fluids passing thru
the rocks.
Metamorphic
Rocks - Rocks changed from other types by heat and/or pressure without
melting - includes the actions of hot fluids passing thru the rocks.
