All About Rocks

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Rocks are the solid material making up the surface of the Earth.

Minerals are the solid chemical compunds of which Rocks are made.

Rocks

• The Rock Cycle – All the moving, shaking, sqeezing, erupting, exploding and eroding that the Earth gets up to keeps rocks changing from one orm to another. (4:28)

Igneous Rocks are Formed Directly from Molten Rock

• Igneous Rock Formation – Primer on the origins of Igneous Rocks (4:15)

• Classification of Igneous Rocks – How igneous rocks are classified, and what each rock tells you about the conditions under which it was formed. (20:16)

Mafic: Magnesium + Ferric (Iron) bearing, therefore dark-colored

Felsic: Feldspar + Silica bearing, therefore light-colored

Metamorphic Rocks are Formed Existing Rocks by Heat and Pressure

• How Metamorphic Rocks are Formed  (6:25)

• How Metamorphic Rocks are Classified  (14:17)

Sedimentary Rocks are Formed when Mineral and Organic Particles are Depositied at the Surface, and Undergo Cementation

• How Sedimentary Rocks are Formed  (6:25)

• Sedimentary Rock Identification – A more detailed look at the formation of Sedimentary Rocks, showing us more environments within which it can happen. (15:00)