Transcript Rock Classification

Sedimentary,
Igneous
&
Metamorphic
Rock
What is it made up of?
 Sand, clay, silt, organic matter (fossils)
How is it formed (process)?
 Weathering (wind, flowing water, ice, living organisms)
create sediment
 Erosion moves/transports the sediment (water, wind
etc.)
 Deposition – sediment is deposited at the bottom of
bodies of water
 Cementation/lithification – the layers are pressed
together (cemented) to form rock
Where are sedimentary rocks formed?
 At the bottoms of lakes, rivers, oceans, streams…
Examples:
 Sandstone, limestone, shale
Sedimentary rocks are used For:
 Buildings, statues
 What is it made up of?
 Previous sedimentary and igneous rock
 MAY HAVE fossils
 Contain layers which look like wavy bands
 Hardest rock
 How is it formed (process)?
 Extreme heat and pressure due to the movement of the
Earth’s crust
Where are Metamorphic rocks formed?
 Underground in hot temperatures
Examples:
 Slate and marble
Metamorphic rocks are used for:
 Countertops, chalkboards, roof shingles, floors
What is it made up of?
 Previous sedimentary and metamorphic rock
 Intrusive igneous rock- cooled magma
 Extrusive igneous rock-cooled lava
How is it formed (process)?
 When magma and lava cools and hardens
 Intrusive – cools slowly and forms large crystals
 Extrusive – cools quickly and forms small crystals or
none at all
Where are Igneous rocks formed?
 Intrusive igneous rock is formed from magma below
ground.
 Extrusive igneous rock is formed from lava above
ground.
Examples:
 Intrusive – granite
 Extrusive - obsidian and pumice
Igneous rocks are used for:
 Intrusive - buildings, countertops, statues
 Extrusive - arrow heads, sharp blades
ROCK
CYCLE
 Types of Rock and Rock Cycle
 https://www.youtube.com/watch?v=Pwlr2uSSgcc
 Rocks Song
 https://www.youtube.com/watch?v=b_4Y21Pprzw