Rocks, Resources&Scenery Flashcards
ISSUES WITH QUARRYING
what are the uses for quarrying?
Building stone
Cement
Like for farming
Aggregate
ISSUES WITH QUARRYING
Define the word Aggregate
Crushed stone from tough rock
Eg: Limestone
It is used in construction industry+ road buildings
ISSUES WITH QUARRYING
How many quarry’s are there in the Peak District?
Give a case study+ it’s where about?
12
Hope Quarry- Peak District- Castleton
QUARRY+ENVIRONMENT
What actions have been done to Hope Quarry to help maintain the environment?
Landscape+tree planting to reduce the visual impact of the quarry
Aim to reduce dust
£15M to help improve transport- railway road rather than roads to reduce traffic
Hope Cement Works produced 1tonne of CO2 per year= 2003- 7,000 trees were planted
Old Quarry-managed as a wetland reserve
WEATHERING
Define Weathering?
Name three types of Weathering?
Break up/decay of rocks in their original place at/ close to the earths surface
Mechanical
Chemical
Biological
WEATHERING
Define Mechanical, Physical and Biological Weathering
Mechanical: does not involve chemical change.
Break up of rocks without any chemical changes
Results in piles of angular rocks (screw) found at the foot of bare outcrops
Chemical: weathering that involves a chemical change taking place
Biological: involves actions of flora+fauna. Weathering caused my living organisms.
WEATHERING
Name two types of Mechanical and Chemical Weathering and give their definitions
Mechanical:
Freeze Thaw: weathering that involves repeated cycle of freezing and thawing
Exfoliation: flaking of the outer layers of rock mainly caused by repeated cycles of hot and cold= onion skin
Chemical:
Solution: dissolving rocks and minerals in rain water
Carbonation: weathering of limestone+chalk by acidic rainwater
WEATHERING
Stages of carbonation
- Rain water picks up CO2
- Rain water becomes a weak carbonic acid.
- Acidic rain water reacts with CaCo3 to form Calcium Bicarbonate which then dissolves the chalk+limestone
ROCK CYCLE
Definition of the Rock Cycle?
Can rocks be recycled?
How is igneous Rock recycled?
Connections between the three rock types shown in the form of a diagram
Yes they can be recycled
1. Broken down by weathering+transported to the sea as sediment
2. On sea bed the sediment turns into sedimentary rock
3. When uplifted to form a new mountain range sedimentary rock is then put under a lot of pressure
4. Some transports to metamorphic rock
5. Some form magma to then be cooled to form new igneous rock
HOW WERE ROCKS FORMED
3 types of rock+ definitions
Igneous: rocks formed from the cooling of molten magma
Sedimentary: commonly rocks formed from the accumulation of sediment on the sea floor
Metamorphic: rocks that have undergone a cb age in their texture as a result of heating/ pressure
HOW ROCKS WERE FORMED
What’s the Geological Timescale?
Period of geological time since life became abundant 52M years ago. which then helically divided into eras and periods
HOW ROCKS WERE FORMED
Give the characteristics+examples of the three types of rocks
Igneous: composed interlocking crystals=crystalline- tough+resistant to erosion. Example: Basalt= extrusive Granite=intrusive
Sedimentary: forms layers of beds. Contains fossils. Some can be tough Eg: Limestone most are weaker than igneous/metamorphic
Example: Sandstone- Limestone (Chalk is a form of Limestone)
Metamorphic: crystalline, exhibit layering (no beds) leaving cleavage and banding. Tough+Resistant
Example: Slate and Gneiss
WHAT ARE THE CHARACTERISTICS OF GRANITE
what’s intrusive and extrusive?
Intrusive: on ground
Extrusive: by volcanic activity
CHARACTERISTICS OF GRANITE
What type of rock is granite+ give its characteristics?
Intrusive igneous impermeable rock
CHARACTERISTICS OF GRANITE
What is a Batholith?
Huge irregular shaped mass of intrusive igneous rock that only reaches the ground surface when the overlying rocks are removed
CHARACTERISTICS OF GRANITE
Case Study for a granite landform?
Three minerals that granite contains?
Dartmoor
Pink feldspar
Black Mica
Grey colours Quartz
CHARACTERISTICS OF GRANITE
What is feldspar?
What does granite contain?
Feldspar: mineral that is vulnerable to chemical weathering+ decays to form white clay Eg: China
Granite contains horizontal vertical joints
CHARACTERISTICS OF GRANITE
Define Joints
What type of weathering takes place in Batholiths?
Joints: cracks that may run vertically/ horizontally through rocks
Mechanical: freeze thaw+ exfoliation
CHARACTERISTICS OF GRANITE
As granite is impermeable what happens to granites landscape?
What does the environment look like around granite landscapes?
Wet and marshy with plenty rivers Environment: -windswept and bleak - heavy rainfall/snow in winter - low grasses - stunted trees=mostly cover moors+they deeply dissect rivers