Unit 2 - Topic 4 - UK landscape Section Flashcards
Rock types
What are the 3 main rock types?
Igneous, sedimentary, metamorphic
Rock types
What are the two main types of igneous rock?
Granite and basalt
Rock types
Volcanic igneous rock is formed from cooling ____ whereas plutonic igneous rock is formed from cooling ____
Lava then magma
Rock types
Which type of rock has smaller crystals: basalt or granite rock?
Basalt
Rock types
What type of igneous rock is basalt?
Volcanic
Rock types
What makes a type of igneous rock have small crystals?
Small cooling time
Rock types
True or false: igneous rock is very resistant
True
Rock types
How is igneous rock formed?
Formed from cooling lava (volcanic) or magma (plutonic) which crystallises and makes rocks
Rock types
How is sedimentary rock made?
Deposited and compacted sediment
Rock types
What three stages take place to break up igneous rock and form compacted layers of sediment?
Weathering, erosion, transportation and deposition
Rock types
What type of sedimentary rock is formed from compacted sand?
Sandstone
Rock types
What type of sedimentary rock is formed from compacted sandstone?
Millstone grit
Rock types
What type of sedimentary rock is formed from compacted mud?
Clay
Rock types
What type of sedimentary rock is formed from 1 stage of compacted clay?
Shale
Rock types
What type of metamorphic rock is formed from compacted shale
Slate
Rock types
True or false: neither sandstone or millstone grit are resistant
False: they are both very resistant - millstone grit is more resistant
Rock types
When sandstone is younger (<100 million years old) it is ___ resistant whereas when it is older (>300 million years old) it is ___ resistant
Less then more
Rock types
Clay is _____ whereas shale is ____ but then slate is _____
Choose words from: brittle/harder, crumbly/weak, very resistant
Crumbly/weak, brittle/harder, very resistant
Rock types
What type of rock is schist?
Metamorphic
Rock types
How is metamorphic rock formed?
Sedimentary rock under pressure and heat
Rock types
What is chalk formed from?
Compacted oceanic organic matter
Rock types
Chalk has ____ resistance than clay
More/less
More
Rock types
What is Carboniferous limestone formed from?
Crystallised coral, fossils and rock fragments (using calcium carbonate)
Rock types
Which properties does Carboniferous limestone have:
Layers called bedding planes
Resistant
Porous/permeable
All of them
Rock types
What is marble (metamorphic) rock formed from?
Limestone
Rock types
True or false: chalk is young limestone
True
Rock types
State the rock types in this order of rock creation
Clay
Shale
Slate
Schist
Sedimentary then metamorphic (slate and schist)
Rock types
Select the rock types in this order of rock creation
Sandstone
Millstone grit
Chalk
Carboniferous limestone
Marble
Sedimentary then marble is metamorphic
Rock types
What is the distribution of igneous rock across the UK
Sparse clusters
Rock types
What is the distribution of sedimentary rock in the UK
Found south east of the tees exe line
Rock types
What is the distribution of metamorphic in the UK?
Found in Northern Ireland and Scotland
Rock types
True or false: wales has allot of Carboniferous limestone
True
Rock types
What does the tees exe line separate
Older vs younger, sedimentary vs other rocks, and highland vs lowland
Rock types
Where does the Tees Exe run between?
River Tees in Newcastle and river Exe in Devon
Rock types
Where are the fens?
South east England
Rock types
What word describes the pattern of rock distribution in the UK
Strata / linear pattern
Rock types
What is geology?
The study of the structure of the earth, it’s history and rocks
Rock types
What are two ways in which geology influences relief?
________ sedimentary makes lowland
_____ sedimentary and _____ make upland as they are ____ resistant
Younger
Older
Metamorphic
More
Rock types
What is relief?
The way landscape changes with height
Rock types
What is topography?
The shape of the land
Rock types
What is a plateau
An area of flat upland
Rock types
What is upland vs lowland?
High above sea level vs low (close to sea level)
Rock types
What are rock strata
Layers/lines of rock
Rock types
What is a landscape ?
An area of land with particular shapes and features (can be viewed at one point)
Rock types
What is a landform?
A distinct natural feature of land shaped by natural processes
Rock types
What is the relationship between topography and geology
Less resistant rocks are flat as weather and erosion occur and prevent distinct shapes being formed
Glaciation
What is an ice age?
Period of colder climates where ice forms on land
Glaciation
What is the term for periods between glacial periods
Interglacial periods
Glaciation
What was the most recent ice age?
Pleistocene - 2 million years ago
Glaciation
What is the concept of paleomagnetism?
Magnetism of the rock is frozen into it
Glaciation
What is the concept of paleomagnetism used to do?
Radiation can detect and date rocks
Glaciation
True or false: London didn’t have ice reach it
True
Glaciation
What is an arête?
Two back to back corries
Glaciation
What is a hanging valley?
Smaller glaciers erode valley less than main glaciers - waterfalls often from around here
Glaciation
What are the three stages of corrie formation?
Snow accumulates
Plucking steepens - vertical erosion + rotational slip + abrasion
Slope breaks more and deepens wall with lateral erosion (freeze thaw weathering) - makes bowl shape
Glaciation
What is a ribbon lake?
Glaciers move over hard then soft rock, eroding soft rock easily and creating space for a ribbon lake
Glaciation
How is a u shaped valley made?
Glaciers widen and steepen valleys with lateral and vertical erosion
Glaciation
What is a process?
Something that shapes a feature
Glaciation
What is a feature?
Naturally occurring aspect of the land shaped by a feature
Glaciation
What is an erratic?
Plucking moves large rocks through transportation down valley and then deposition
Glaciation
What is a pyramidal peak?
Formed when 3 or more corries meet
Glaciation
What is freeze thaw weathering?
Freshwater enters cracks in rock, freezes, expands by 10% then breaks rock
Glaciation
What type of erosion (vertical or lateral) is plucking?
Vertical
Glaciation
What is plucking?
Ice freezes around rocks, as glacier moves it pulls rocks with it
Glaciation
What is abrasion?
Plucked rocks scrape against each other and mark the land
Glaciation
What type of erosion is abrasion (vertical or lateral erosion)?
Vertical mainly - might need checking
Glaciation
What is transportation?
The glacier carries stuff as rocks fall on it or trapped under or frozen into it
Glaciation
What is deposition?
A glacier melts and all the material (glacial till) is left on the valley floor
Glaciation
What is the material that the glacier holds called?
Glacial till
Glaciation
What does glacial melting create?
Glacier melts at lower altitudes and feeds river or lake
Glaciation
What are the main weathering processes in the Lake District?
Freeze thaw weathering (physical) chemical weathering
Glaciation
What is continental drift?
When continents move
Glaciation
The UK used to be much closer to a plate boundary due to continental drift - what 3 things did this cause
- Active volcano ->igneous rock
- Heat and pressure from colliding plates ->metamorphic rock
- Plate collisions at convergent plate boundaries -> folded rock
Glaciation
What feature is found at Malham Cove?
Limestone pavement
Glaciation
How was the limestone pavement at Malham cove formed?
Plates compress rock, push it up
Cracks in pavement form
UK Landscape
What are three mountain ranges of high relief in UK?
Pennines(Cumbria), Grampians (Scotland), Cambrians (Wales)