What is Onion Skin Weathering?
Onion skin weathering is when the heat expands the rocks, and then at night they contract since it is cooler. This is almost similar to the freeze thaw weathering, except it doesn't include water. Repeating this process allows small pieces of rock to fall off. The small pieces of rocks are called scree and they look like a thin layer of onion skin, hence the name "Onion Skin weathering". Normally, the scree will fall down and form a mountain of small rocks. So by the time the rock is weathered away, it will leave a huge mountain of small rocks.
Where is it normally found?Onion skin weathering is normally found in places with hot climates. A good example would be in the desert. The desert is very hot during the day and cold during the night.
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