Zusammenfassung der Ressource
Types of Rocks
- Igneous
- Formation
- Formed by the cooling of
molten magma caused by
volcanic activity
- Magma cools
underground > Intrusive
- Magma cools on ground
surface > Extrusive
- Characteristics
- Crystalline
- Made up of interlocking crystals
- Tough, Hard, Resistant
to Erosion
- Examples
- Granite
- Widely used for construction
and monuments
- Basalt
- Metamorphic
- Formation
- Formed within the
Earth's crust
- When another rock is
changed by huge amounts of
heat and pressure
- Characteristics
- Often exhibit layering called cleavage
- Tough and resistant
to erosion
- Examples
- Slate
- SHALE (Sedimentary) >
SLATE (Metamorphic)
- Used for roofing
- Marble
- LIMESTONE (Sedimentary) >
MARBLE (Metamorphic)
- Used for buildings and
ornate statues
- Sedimentary
- Formation
- Sediment eroded from
land by wind/rivers/ice is
deposited in the sea
- LITHIFACTION
- Sediment is compacted on the sea
bed until it forms layers of solid
rocks
- Characteristics
- Usually found in layers
called BEDS
- Normally weaker
than other rocks
- Some i.e. Limestone
are tough
- Vertical Joints,
Horizontal Bedding
Planes
- Examples
- Limestone
- Used in cement
and glass
- Chalk
- Formed from COCCOLITHS
- Used to make
quicklime and mortar
- Sandstone
- Consists of Sand particles
- Used in construction