NATS 1750 Lecture Notes - Lecture 11: Drilling And Blasting, Landform, Pyroxene

• School: York University
• Department: Natural Science
• Course: NATS 1750
• Professor: Mary- Helen Armour

Document Summary

In talking about processes so far, they originate from internal forces that are shaping the rock and structure. These are mostly driven by the heat of the interior of earth. However, there are also exterior forces that shape the surface that are responsible for the production of sedimentary rock. In this lesson, we will discuss the first two. In most situation, both will occur simultaneously and mechanical weathering increasing surface area, will increase the rate of chemical weathering. We also look at what affects the rate of weathering and what some of the products of weathering are. There are 3 main type of mechanical weathering: Occurs as water penetrates into cracks in the existing rock. The water freezes creating ice which will wedge a crack open. It will expand and breaks the rock. Over many freeze thaw cycles it will break down significant amounts of rock ~ a block is lifted and pushed out.