igneous, metamorphic, sedimentary rocks. igneous rocks where do igneous rocks come from? some of...
DESCRIPTION
Extrusive Rock Igneous rock formed by lava on the earth’s surface. (Basalt)TRANSCRIPT
Igneous, Metamorphic, Sedimentary
Rocks
Igneous Rocks
• Where do Igneous rocks come from?• Some of the first rocks• How are they classified?– Where they are from– Texture– Mineral Composition
Extrusive Rock
• Igneous rock formed by lava on the earth’s surface. (Basalt)
Intrusive Rock
• Igneous rock formed when magma beneath the earth’s surface hardens. (Granite)
Texture
• Extrusive=Rough or smooth• Intrusive=Rough or coarse (sandpaper)
Mineral Composition
• Different minerals give rock its color• Feldspar (pink)• Hornblende• Mica (light gray)• Quartz (smoky)
Sedimentary Rocks
• What is sediment?• How does it become rock?– Erosion-Depostition-Compaction-Cementation– THIS TAKES A LONG TIME!
3 Main Types of Sedimentary
• Clastic– When pieces of rock squeeze together
3 Main Types of Sedimentary
• Organic – When dead plants and animals compact together
3 Main Types of Sedimentary
• Chemical– Minerals dissolve and crystalize
Metamorphic Rocks
• Sedimentary or Igneous rock that changes because of heat or pressure
• Classifying these rocks– Foliated– Nonfoliated