GEO 110 Lecture Notes - Lecture 6: Karst, Thermal Expansion, Crystal Growth
14 Sep 2016
School
Department
Course
Professor
Document Summary
No change in the chemical changes in the composition of rocks. Pressure release fracturing occur when granite rocks or intrusive rocks which are formed deeper in the earth and exposed after years of erosion. Once erosion takes place the pressure is released (rocks will expand and cracks build up)and the rocks break down into smaller fragments. Frost-wedging occur when ice crystals accumulate in cavities of rocks at night, and during day the ice melts and the rocks contract as melting takes place. Wrong to climb mountains in the day as the ice holding the rocks together may melt due to the sunlight. Common along atlantic coast of canada very cold water conditions at night. Abrasion is the process of collision between loose sediments that are transported by weight and stable/permanent rocks on the surface of the land. When rocks collide with airborne particles, it smoothens the rock and over time it is polished.
