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| 1.
Caused when overlying material is removed and intrusive igneous rock expands. |
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| 2.
Caused when water seeps into cracks, freezes, widens crack, more water gets in, etc. Typically a daily cycle, though may be seasonal. |
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| 3.
Caused by friction and impacts when water, wind, or ice carrying debris passes by another material. |
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| 4.
Dissolving of rocks or minerals in the presence of water. |
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| 5.
Alteration of iron-rich rocks or minerals into other substances due to oxygen. |
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