GEOL105 Lecture Notes - Lecture 10: Seabed Gouging By Ice, Hydraulic Action, Abrasive Blasting

• School: University of Delaware
• Department: Geology
• Course: GEOL105
• Professor: Claire O'Neal

Document Summary

Moon and earth are made of the same parent material. But the surface of the moon stays the same. The break down of earth materials over time due to exposure to the elements. Sits in place and becomes a soil. Sediment removed, transported away, deposited somewhere else. Mechanical scraping away of earth materials by water, wind, or ice. Tiny grains carried by the water, wind, or ice scour away at stationary rock or soil. The force of rocks and stones carried by the river bash into the river bed and walls. But sometimes you get to see them. Geologic time scales, changes are mostly slow. Over geologic time, earth materials follow entropy. Rock masses-> time and weathering and gravity -> sediment. Water forces itself or air into cracks. Ice takes up a 9 percent greater volume than the same amount of liquid water. Repeated cycles of expansion and cooling -> stress.