Limestone and Edinburgh Flashcards
Limestone pavement formation
Limestone - layered rock made up of vertical joints and horizontal bedding planes, exposed by ice glaciers scraping soil away. Permeable - water passes through so it can dissolve.
EXPLAIN CARBONATION
Over time carbonation continues which leaves blocks called clints which are separated by grykes which forms a limestone pavement.
Swallow hole formation
- Limestone permeable so swallow holes can be formed
- Streams & rainwater run along joints & bedding planes
- carbonation (EXPLAIN CARBONATION) occurs
- continued carbonation widens joints to form a swallow hole - water disappears down it
Carbonation
Rainwater absorbs CO2 when falling forming weak carbonic acid
Limestone permeable so rainwater runs through it
Limestone alkali as contains calcium carbonate so is dissolved by acid in water
Intermittent drainage formation
Streams flow over limestone and disappear down swallow hole. Travels along joints and bedding planes until it reaches impermeable water table. Travels along water table until eventually reappears at spring. After heavy rain, water table could rise which causes underground stream to flow above ground. Not always there so called intermittent drainage.
Cave formation
Limestone permeable so water seeps in and flows through joints and bedding planes. Caves formed when water enters limestone through swallow hole and goes underground. Water flows along joints & bedding planes dissolving limestone .EXPLAIN CARBONATION. Carbonation continues dissolving limestone until it reaches impermeable rock. A cave is formed.
Stalactites formation
Limestone permeable, water seeps in and flows through joints & bedding planes in the rock. Caves formed when water goes underground through swallow hole and dissolves rock. The water that drips into cave contains calcium carbonate from carbonation. Water drips very slowly allowing evaporation to occur - this gets rid of water and leaves behind calcium carbonate which is deposited on roof as drip stone. This is continued and the deposited calcium carbonated grows downwards to form stalactites.
Stalagmites formation
Limestone permeable, water seeps in and flows through joints & bedding planes in the rock. Caves formed when water goes underground through swallow hole and dissolves rock. The water that drips into cave contains calcium carbonate from carbonation. Some water drips onto floor of cave - evaporates leaving behind calcium carbonate, slowly deposits more from dripping water and grows upwards forming a stalagmite
Pillar formation
Stalagmites and stalactites grow until they meet to form a pillar. ( EXPLAIN FORMATION OF STALACTITE)
What are four land uses in limestone areas
Tourism
Farming
Quarrying
Military training
2 things which mean it can’t be an arable farm and has to be a hill sheep farm on slope
Steep slopes mean machines can’t move
Poor weather and soil means that crops can’t be grown
Why are hill sheep farms good for slopes - 4 advantages sheep have
Wooly coat keeps sheep warm in hilly moors and cold temperatures up on the hills
Small legs mean they have low centre of gravity which stops them falling over on steep slopes
Strong hooves mean they can move about easily on rocky terrain
Sheep are low maintenance and can survive on poor grass on moors (only eat grass and don’t need equipment up hills due to being low maintenance)
2 things attracting tourists in Yorkshire (land uses)
Sport - cycling like tour de Yorkshire and hillwalking (3 peaks challenge) and pot holing (gaping gill)
Beauty and scenery - Malham cove (limestone pavement) and underground caves (hyleborough)
What are 2 reasons people do quarrying (land use)
Easy to shape due to its joints and bedding planes
In demand as used for cement and on roads
3 reasons why military training is a good land use in Yorkshire
Middle of nowhere so not disturbing others or being disturbed
Large, cold area so prepares physical endurance
Close to Catterick base
4 land use zones
CBD
Inner city
Suburbs
Rural Urban Fringe