1. Unit 2 Lithosphere Rocks

2. Rocks Types: Igneous, Sedimentary, Metamorphic

3. Types of Rocks - Igneous
Intrusive - Forms when magma cools and crystalizes (turns solid) inside the Earth. Magma cools slowly and forms large crystals.
Ex. Granite

4. Types of Rocks - Igneous
Extrusive - Forms when lava cools and crystalizes (solidifies)outside of the Earth’s surface.
Lava cools quickly and can form small
crystals.
Ex. Obsidian or Pumice (with air)

6. Types of Rocks - Sedimentary
Sedimentary rock - forms when small pieces of rock or biological sediments are compacted and cemented together.
Steps to make a sedimentary rock:
break down other rocks
move and deposit sediment
sediments compact and cement (stick) together.

7. Types of Rocks - Sedimentary
Organic- contains materials from living things.
Ex. Fossils, Coal

8. Types of Rocks - Sedimentary
Detrital - Grains are cemented together and can often be seen in layers or clumps.
Large grains = coarse
Small grains = fine

9. Types of Rocks - Sedimentary
Importance:
Make up 75% of the Earth’s Crust.
Fossil Fuels are sedimentary rocks (coal) or found in sedimentary rock.

10. Types of Rocks - Metamorphic
Metamorphic Rocks - formed when heat and/or pressure change the physical or chemical properties of existing rocks.

11. Types of Rocks - Metamorphic
Foliated – Bands
or Unfoliated – No Bands

12. Common Metamorphic Rocks
Limestone becomes Marble
Shale and Slate become Schist
Sandstone becomes Quartzite
Granite becomes Gneiss

13. THE ROCK CYCLE SEDIMENTARY METAMORPHIC IGNEOUS
Weathering, Erosion, Deposition,
Cementation, Compaction
Weathering, Erosion, Deposition,
Cementation, Compaction
SEDIMENTARY
Heat & Pressure
Melting & Cooling
Melting & Cooling
METAMORPHIC
IGNEOUS
Heat & Pressure
Heat & Pressure
Melting & Cooling