GEOL 101 Study Guide - Final Guide: Sea Level Rise, Subsidence, Ice Ii
Document Summary
15. 1 glaciers: a part of two basic cycles. Glaciers are tick ice masses that form over hundreds or thousands of years: it originates on land and moves slowly, poles and mountains, part of two cycles: hydrologic and rock cycle. Valley (alpine ) glaciers: valley/alpine glaciers- a stream of ice, bounded by precipitous rock walls, can be long or short, narrow or wide, move centimeters a day. Ice sheets: ice sheets are much bigger. Other types: ice caps- covering uplands and plateaus are masses of glacial ice, outlet glaciers- fed by ice caps and sheets, flow down from valleys, extending outward from the margins. 15. 2 formation and movement of glacial ice: glaciers develop in the high latitude polar realm, because of low temperature, snowline- elevation where snow remains year round. Glacial ice formation: snow accumulates and the crystal shape changes, snowflake becomes smaller and more spherical, firn- granular recrystallized snow.
