GEOG 201 Study Guide - Midterm Guide: Point Bar, Seismic Wave, Seismometer

• School: University of Maryland
• Department: Geographical Sciences
• Course: GEOG 201
• Professor: Ralph Dubayah, Keith Yearwood

Document Summary

Know and understand how the types of physical (mechanical) weathering help to disintegrate rocks. Mechanical weathering: physical forces actually break up the rock (disintegrate physically) into smaller pieces; mineral structure stays the same; 3 types: frost wedging, salt crystal growth, and exfoliation. Water freezes and expands which overcomes the rock"s tensional strength. The repeated freezing (expanding) and thawing (contracting) breaks apart the rock. Typically occurs in hot dry regions, salt comes from sea spray/salty groundwater that penetrates the rock crevices. Then the water evaporates, and the salt stays then eventually crystallizes, crystals eventually grow larger and enlarge the cracks which leads to disintegration. Process whereby rock peels or slips off in sheets instead of breaking into grains aka sheeting. Creates dome/arch shaped features and occurs as pressure is released from the removal of overlying rock. Understand the process of oxidation and how it weathers rocks.