Three Types of Rocks

Igneous Rock
A rock formed by the solidification of a magma

• Granite
• Basalt
• Obsidian
• Rhyolite
• Gabbro
• Pumice

Metamorphic Rock
A rock whose original mineralogy, texture, or composition has been changed by the effects of pressure, temperature, or the gain or loss of chemical components.

• Gneiss
• Schist
• Slate
• Quartzite
• Marble
• Dolomite

Sedimentary Rock
A rock formed by the accumulation and cementation of mineral grains by wind, water, or ice transportation to the site of deposition of by chemical precipitation at the site.

• Sandstone
• Limestone
• Shale
• Chert
• Antracite
• Conglomerate
• Breccia