Geography Paper 2 Flashcards
How are sedimentary rocks formed?
Sedimentary rocks are formed from layers of sediment that has compacted together over time
What are the three main types of sedimentary rock in the UK?
The three main types of sedimentary rock in the UK are limestone, chalk and clay
How is limestone formed?
Limestone is formed from the suppression of shells and skeletons of dead marine organisms over time
How is chalk formed?
Chalk is formed from the suppression of shells and skeletons of dead marine organisms over time similarly to limestone, but however are softer in texture
How is clay formed?
Clay is a very soft rock formed from mud and clay minerals
Where is chalk and clay mainly found in the UK?
Chalk and clay is mostly found in South-East England
Where is limestone mainly found in the UK?
Limestone is mostly found to the North and West of England
What are igneous rock?
Igneous rock is formed from when the Earth’s magma from the Mantle cools and harden, meaning a main feature of them are that they are hard
Where are igneous rocks mainly found in the UK?
Igneous rock is mostly found in Scotland, North-East of England, Lake District and Snowdonia (Wales)
How is metamorphic rocks formed?
Metamorphic rocks are formed from intense heat and pressure which causes other rocks to change. The resulting rocks are more hard and compact.
Name the main metamorphic rock types in the UK
Shale, Slate and Schist are main igneous rock types
Where are metamorphic rocks mostly found in the UK?
Metamorphic rocks are mainly found in large bands across Scotland, Northern Ireland and Wales
Which landscapes are formed from limestone?
Limestone forms valleys and resurgent rivers due to being heavily affected by carbonate weathering
What are the features of the UK uplands?
The UK uplands are rugged, with steep relief and weathered rocks
What are the features of the UK lowlands?
The UK lowlands have gentle relief and very fertile soil
What happens to rivers at the end of glacial periods?
At the end of glacial periods, rivers become much bigger and more powerful as melted ice has flowed into them, meaning they erode the landscape with a greater force
What is plucking?
Plucking is when meltwater freezes on a piece of rock surrounding a glacier and then rips off bits of the rock when it moves
What is abrasion?
Abrasion is when rocks scrape along the seabed
What is freeze-thaw weathering?
Freeze-thaw weathering is when water fills cracks in rocks, itll freeze and expand, putting pressure on the rock. This freezing and thawing erodes the rock.
What are the human activities that affect the UK physical landscape?
The human activities that affect the UK physical landscape include agrictulture, settlements and forestry
How do settlements affect the landscape?
Settlements are built by clearing land. Building things out of impermeable materials such as concrete increases surface run-off and can change drainage patterns.
How does agriculture affect the landscape?
Agriculture involves clearing land for harvesting and cattle farming, increasing grazing by the animals. Hedgerows and drainage ditches are also introduced.
What are concordant coastlines?
Concordant coastlines are rock layers parallel to the coast. They have a harder layer protecting less resistant rock inland as once broken through, caves are created as the softer rock is eroded more rapidly
What are discordant coastlines?
Discordant coastlines are alternating rock types perpendicular to the coast.
What are formed at discordant coastlines?
At discordant coastlines, headlands and bays are formed
How are wave-cut platforms formed?
Wave-cut platforms are formed when overtime the cliff is undercut and the unsupported cliff face collapses. The cliff retreats inland leaving a flat rocky area visible at low tide which is a wave cut platform
What factors increase erosion of the coast?
- Storm surges (mores torms > higher winds > lower pressures > larger waves)
- Prevailing winds (longer fetch > more destructive waves)
- Sub aerial processes (mass movement, slumping, sliding)
- Weathering