ESS105H1 Study Guide - Midterm Guide: Halide Minerals, Continental Crust, Silicate Minerals
Document Summary
Rocks and smaller sized sediment at glacier"s base scrapes the bedrock through a process called abrasion (when they get embedded in the base and side of a glacier) Plucking: when rocks and stones become frozen on the base or side of a glacier. Supraglacially (at the surface), englacially (within the ice) and subglacially (base of the ice) Moraine: sediment carried and deposited by a glacier. A lateral moraine forms along the sides of a glacier, expressed as a dark fringe or rocks and other debris. The period when glaciers are melting is called interglacial period. In the past, huge ice sheets covered the northern and southern hemispheres. Glacier increase happened during the glacial period and glacial melting happened in the interglacial period. Compared to other periods in time, the past two million years had the highest increase in glaciers. This is why geologists call it the ice age.
