The Rock Cycle Sedimentary Rocks that form when

The Rock Cycle

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

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

Sandstone Description Formation dull grainy cementing grains of sand

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

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

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

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

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

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

Slate Description Formation Splits into layers metamorphism of shale

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

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

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

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

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