GEG-1 Lecture Notes - Lecture 10: Metamorphic Rock, Igneous Rock, Sedimentary Rock
Document Summary
Weathering is the breaking down of rocks. Erosion is when rock pieces move from one place to another. Deposition is when rocks or rock pieces are deposited in a certain place. Powdered rock is the most common part of soil and here is how rocks are turned into power: Moving water, such as waves breaking on a shore, wears away rocks into fine bits. Water in a rock crack expands when it freezes. Oxygen, carbon dioxide and moisture are all present in air. This expansion force is so great that it can split the rock. When they combine with chemicals in rocks, the rocks break down and decay small grains. The pelting, grinding action of wind-driven dust or sand can reduce great rocks to. After they have taken the food from the soil, they discard the soil, but in much smaller grains than when they took it in. Changes in temperature will help turn rocks into soil.
