1. The Rock Cycle

2. Rocks that form when sediments are compacted and cemented together.
Sedimentary
Rocks that form when sediments are compacted and cemented together.

3. Sedimentary
The sediments come from weathering and erosion of igneous, metamorphic, or other sedimentary rock.

4. cementing grains of sand
Sandstone
Description
Formation
dull
grainy
cementing grains of sand

5. Most are consolidation of skeletons of marine invertebrates
Limestone
Description
Formation
Dull
Fine to coarse grain
Most are consolidation of skeletons of marine invertebrates

6. Consolidation of mud or clay
Shale
Description
Formation
Dull
Splits into layers
Consolidation of mud or clay

7. Metamorphic
Rock that forms when the texture and composition of a pre-existing rock is changed by heat or pressure deep underground.

8. Metamorphic
Igneous and sedimentary rock can change into metamorphic rock, and metamorphic rock can change into other metamorphic rock.

9. hard, made of glassy grains metamorphism of limestone
Marble
Description
Formation
hard, made of glassy grains
metamorphism of limestone

10. Hard, sparkly grains, dense metamorphism of sandstone
Quartzite
Description
Formation
Hard, sparkly grains, dense
metamorphism of sandstone

11. Slate
Description
Formation
Splits into layers
metamorphism of shale

12. Igneous
Forms from the cooling of magma. When magma cools and solidifies, it forms igneous rock

13. Granite
Description
Formation
coarse grain with clear glassy minerals
formed from magma

14. Smooth with possible air bubbles, light
Basalt
Description
Formation
Smooth with possible air bubbles, light
Volcanic rock formed by rapid cooling of melted peridotite

15. Glassy, smooth sharp edges Felsic lava cooled rapidly
Obsidian
Description
Formation
Glassy, smooth sharp edges
Felsic lava cooled rapidly

16. 90% porous, light, full of air pockets
Pumice
Usually dark colored
90% porous, light, full of air pockets
Formed when material is ejected into the air as froth