PDF-Glaciers of North America

SATELLITE IMAGE ATLAS OF GLACIERS OF THE WORLDRICHARD S WILLIAMS Jr GEOLOGICAL SURVEY PROFNAL PAPER 1386. ?”. with Dr. Michael . Kaplan. Dr. Michael J Passow. Originally presented 25 Oct 2014. Glaciers. Two basic types:. Polar Ice Sheets—Antarctica and Greenland. Alpine/Mountain glaciers. Found today in all continents except Australia. Heaviest particles are unloaded first as a river loses momentum, closest to shore, forming a thick layer of sediment.. Smaller particles are dropped further out leaving a thin layer.. This process is repeated over and over again, until a delta is formed.. January 21, 2011. . Glaciers act as agents of erosion and deposition to help to create unique landforms which you will study in this unit. Glacier. : A large mass of ice resting on land or floating as an ice shelf in the sea adjacent to land. Ms. Martel. What Is A Glacier?. About 75% of Earth’s fresh water is frozen in glaciers.. A glacier is a large mass of compacted snow and ice that moves under the force of gravity.. Glaciers help to carve Earth’s landscapes as it erodes geological features in one place and then re-deposits the material elsewhere. . WED V17. What is a glacier?. A large, long-lasting mass of ice which forms on land and moves . downslope. because of gravity.. What metaphors do we use for glaciers?. Glaciers are often referred to as a . Sunlight, or, lack of.. Insolation. The quantity and intensity of solar radiation upon an object. . In this case, the Earth’s surface.. Assuming the output of energy is constant from the sun, the rays will be spread over a larger area, the nearer you get to the poles.. More winter snowfall than summer melt. Glacier formation is similar to sedimentary rock formation. Types of Glaciers. Valley glaciers or alpine glaciation. Ice sheets or continental glaciation. Glaciers of the world. Glacier Movement. Deposits by Glaciers. The Ice Age. Glaciers and Global Warming. Glacial Rebound . …………………. Snow. Line. …………………... Glaciers form in areas covered by snow, where more snow falls than melts each year.. Chapter 9 - Section 3, 4, 5, and 6. How Water Erodes. Most sediment washes or falls into a river as a result of mass movement and runoff. Other sediment erodes from the bottom or sides of the river. Streams carry sediment in several . 1. Mass Movement. A down . slope movement of loose sediment and weathered rocks resulting from the force of gravity..  Erosion following weathering climatic conditions determine which materials and how much. 20/12CRANK ROD Ultra light controlMagnetic removable rodRemovable cordOne rod for different unitsMade to messure rod length Ultra light controlMagnetic removable rodRemovable cordOne rod for different It originates on land from the accumulation, compaction, and . recrystallization. of snow. .. A glacier appears to be motionless, but glaciers move very slowly.. Glaciers are dynamic weathering . and erosional . Section. for . glaciers. , . snow. and . ice. Norwegian. Water Resources and Energy . Directorate. . lma@nve.no. Glaciers in Norway . are. . changing. . too. ~1900: . Library. . of. . congress. Once . glacial ice exceeds a thickness of about 150 feet, the weight of the overlying ice causes . the . base of . the glacier . to become plastic and flow like a very viscous liquid. While the bottom ice responds as a plastic solid, the surface ice is very brittle. However, from the surface down to the top of the plastic portion of the glacier, the ice experiences a decrease in .