GENERAL GEOLOGY

Detailed explanation-1: -There are two main types of physical weathering: Freeze-thaw occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart. Exfoliation occurs as cracks develop parallel to the land surface a consequence of the reduction in pressure during uplift and erosion.

Detailed explanation-2: -Exfoliation is a physical weathering process where the outer surface of the rock cracks and peels away layer by layer due to a temperature change. Frost action is a weathering process where water freezes and expands to widen cracks in the rocks. Oxidation and Carbonation are forms of chemical weathering.

Detailed explanation-3: -Rapidly moving water can lift, for short periods of time, rocks from the stream bottom. When these rocks drop, they collide with other rocks, breaking tiny pieces off. Ice wedging causes many rocks to break. This refers to the repeated freezing and melting of water within small crevices in the rock surface.

Detailed explanation-4: -Exfoliation weathering occurs when outer layers of rocks break off and the released pressure causes rock to expand and break. The formation in California called Half Dome is a well known example of exfoliation weathering.

Detailed explanation-5: -Physical weathering can occur due to temperature, pressure, frost, root action, and burrowing animals.