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Weathering, Rivers & Coasts. F.Ciangura. F.Ciangura. Biological. Onion-Skin Exfoliation. Weathering. Freeze-Thaw/ Frost Shattering. Chemical. F.Ciangura. Rocks break due to action of plants and animals. Seeds get in rock Seeds grow into plants Cracks widen as roots grow
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Weathering, Rivers & Coasts F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
Biological Onion-Skin Exfoliation Weathering Freeze-Thaw/ Frost Shattering Chemical F.Ciangura F.Ciangura
Rocks break due to action of plants and animals. • Seeds get in rock • Seeds grow into plants • Cracks widen as roots grow • Rock breaks up Biological Weathering F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
Roots of tree breaks rock apart F.Ciangura F.Ciangura
Onion-Skin Weathering / Exfoliation F.Ciangura F.Ciangura
During the day the sun heats the rocks. The outer layer of the rock expands by heat. At night it gets cooler and the outer layer of rock shrinks back to its original place F.Ciangura F.Ciangura
The outer layer of rock peels off F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
Freeze-Thaw Weathering/ Frost Shattering F.Ciangura F.Ciangura
When water freezes it expands by 30% Glass bottle has cracked!!! F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
Frost shattering/ freeze-thaw weathering also cracks window sills and water pipes in very cold countries! F.Ciangura F.Ciangura
Chemical Weathering F.Ciangura F.Ciangura
Pollution Chemicals mix with moisture In clouds ACID RAIN F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
Chemicals in rain dissolve limestone F.Ciangura F.Ciangura
Wind Sea Erosion Rivers Ice F.Ciangura
Wind F.Ciangura F.Ciangura
How does the wind erode? Wind carries sand which is very abrasive. F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
Wind +sand Hard rock Wind +sand Soft rock Soft rock is eroded more than the hard rock F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
Andes Mountains (4000m above sea level) Rock sculpted by wind, Utah. F.Ciangura F.Ciangura
Antelope Canyon F.Ciangura F.Ciangura
USA Mexico Antelope canyon (in Arizona) is formed over thecourse of millions of years by erosion of the surrounding sandstone (in this case, Navajo Sandstone), primarily due to flash flooding and secondarily due to wind erosion. F.Ciangura F.Ciangura
Ice F.Ciangura F.Ciangura
A glacier is a frozen river found at the top part of mountains Glacier moves down a mountain side F.Ciangura F.Ciangura
Side of mountain is eroded F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
When a glacier moves down a mountain, it erodes a wide U-shaped valley. F.Ciangura F.Ciangura
The ice that makes up the glacier is heavy So, this ice scrapes off the sides of the mountain like a sandpaper F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
Sea F.Ciangura F.Ciangura
How the sea erodes a headland headland sea F.Ciangura F.Ciangura
Waves continuously hit the cliffs and erode Cliff sides. (Venus Bay, South Australia). F.Ciangura F.Ciangura
Cliff Retreat: The sea erodes the bottom of the cliff, which then falls down. The cliff, thus moves back Cliff F.Ciangura F.Ciangura
Wavecut platform: a geological feature caused by the sea's erosion of cliffs, seen at Southerndown, South Wales. F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
Rivers F.Ciangura F.Ciangura
Rivers erode the rock, transport the material called load, and when the water does not have any More energy, they depost the load to form new landforms. F.Ciangura
Rivers erode the rock River is brown as it transports the load (soil…) F.Ciangura F.Ciangura
Deposition Deposition is the opposite of erosion. Deposition is where a river lays down or drops the sediment or material that it is carrying. Deposition F.Ciangura F.Ciangura
F.Ciangura F.Ciangura
Rivers transport the material called load F.Ciangura F.Ciangura
Upper Course Middle Course Lower Course F.Ciangura F.Ciangura