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Slides on Weathering and Erosion for Irish Junior Cert students. Deals with various types of weathering and Karst landscapes, using the Burren as an example.
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The breakdown of the materials of Earth’s crust into smaller pieces.
Process by which rocks are broken down into smaller pieces by external conditions.
Types of Physical weathering◦ Frost heaving and Frost wedging◦ Plant roots◦ Friction and impact◦ Burrowing of animals◦ Temperature changes
CO2 dissolves in rain water and creates carbonic acid Carbonic acid easily weathers limestone and marble
Water weathers rock by slowly dissolving it
The Limestone Rock sucks in the sun’s heat and keeps the soil warm.
This means rare Mediterranean plants can grow in the Burren
The Limestone Rock sucks in the sun’s heat and keeps the soil warm.
This means rare animals such as Lizards are common in the Burren
Cave makes rain acidicSwallow Hole Limestone area in ClareStalagmite Crack in LimestoneCarbon Dioxide Grows from groundRainwater Underground passageThe Burren Block of limestoneLimestone Where a river disappearsStalactite Hangs on from roof of caveClint Main rock in the BurrenGrike Chemically weathers limestone
Iron combines with oxygen in the presence of water in a processes called oxidation
The product of oxidation is rust
Lichens that grow on rocks produce weak acids that chemically weather rock
Compounds from burning coal, oil and gas react chemically with water forming acids.
Acid rain causes very rapid chemical weathering
The process by which water, ice, wind or gravity moves fragments of rock and soil.
Rivers, streams, and runoff
Glaciers
Landslides, mudslides, slump and creep
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