TYPES OF ROCKS

What's a rock?
A rock is a combination of one or more minerals or organic matter.

3 TYPES OF ROCKS

• Igneous
• Metamorphic
• Sedimentary

IGNEOUS

TYPES OF IGNEOUS ROCKS

• Intrusive Igneous Rock: Cools under earths surface in large chambers, in cracks, or between layers in other rocks. Example: Diorite
• Extrusive Igneous Rock: forms when lava erupts. Example: Basalt

METAMOROHIC

METAMORPHIC ROCKS

• Foliated: mineral grains are arranged in planes or bands. Example: Gneiss
• Nonfoliated: do not have mineral grains that are aligned in planes or bands. Example: Marble

SEDIMENTARY

SEDIMENTARY

• Clastic: forms when sediments are buried, compacted, and cemented together. Example: Sandstone
• Chemical: forms when water evaporates. Example: Halite
• Organic: forms from the remains or fossils. Example: Coquina