Paper 2 Flashcards
How does geology cause upland landscapes?
The geology of the top half of uk is igneous and metamorphic rocks. This forms upland landscapes
How does geology cause lowland landscapes?
Bottom half of uk is mainly sedimentary. Therefore form lowland landscapes
How did past tectonic processes affect the landscape?
How did past glacial processes affect the landscape?
Top half of uk: The ice pressed down on the landscape and eroded it in distinctive ways
Bottom half: Glaciation deposition
How are sedimentary rocks formed?
And examples
Formed from sediments eroded and deposited by the rivers, sea or sea bed
Examples
Chalk
Carboniferous limestone
Clay
How are igneous rocks formed?
And examples?
Made from magma
Example
Igneous
How are metamorphic rocks formed?
And examples?
Igneous and sedimentary rock changed by heat or pressure
Examples:
Schists
Slate
North and west of tees exes line?
Most rocks are older
Most resistant igneous and metamorphic rocks are found here
Older sedimentary rocks are found here
South and east of the tees exes line?
Younger rocks
Weaker sedimentary rocks which erode easily
What are two types of igneous rocks
Extrusive - e.g. obsidian
Instructive - e.g. granite
How do weathering and climatological processes cause upland and lowland processes?
How do post glacial river and slope processes cause upland and lowland landscapes?
How does agriculture affect the landscape?
Trees have been cleared
Drainage ditches
How does forestry affect the landscape?
Straight rows of trees
Variety of trees - typically deciduous buy coniferous trees have been planted for timber
How does settlement affect the landscape?
As settlements grows they take over the landscape
E.g. rivers now run through underground tunnels
What is mechanical weathering?
Physical weathering occurs when physical force breaks rock into pieces. In winter, cracks in the limestone rock will fill with rain. This freezes, expanding in volume which widens the crack so more water gets in. This repeats until rock breaks away.
What is chemical weathering?
Any chemical change or decay in solid rock. Rainwater mixes with atmospheric gases to form weak acids which dissolve alkaline rocks such as limestone.
What is biological weathering?
Although rocks look solid, small cracks allow plant roots to penetrate in search of water and nutrients. As they grow, root cells force the cracks apart, widening them and breaking the rocks into pieces
What are landslides?
Large blocks of rock are weakened by weathering and slide downhill due to gravity
What are slumps?
Saturated soil and weak rock slump along a curved surface
What are rockfalls?
Large and small fragments of rock are continually weathered and eroded until they separate and fall from the cliff as whole parts
What is hydraulic action?
The force of flowing water and creates cracks in the river bed and bank
What is abrasion?
Rocks are carried along the river bed which wears it down
What is attrition?
When stones collide together and smash into each other to create smaller rocks