PPT-EROSION BY WATER, WIND & GLACIERS

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 . Methods of soil conservation (ch3). The key aspects discussed in this chapter are:. Windbreaks. Contour ploughing. Stubble planting. Terraces. Stone walls. Reduce farming in dry weather. Windbreaks. Reforestation. 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. Katya . Hafich. Biological Science Initiative Science Squad 2012. University of Colorado at Boulder. What is a glacier?. A glacier is a large mass of ice that moves very slowly.. ://. geology.about.com. 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. . Section 1: Glaciers – Moving Ice. Section 2: Glacial Erosion and Deposition. Section 3: Ice Ages. Section 1: Glaciers – Moving Ice. . N. atural . forces compact snow to make a large mass of moving ice called a . Do Now:. The material seen below was left behind by a retreating glacier. Describe the sediments seen in the picture. . . Tasman Glacial Moraine, New Zealand. Formed from the accumulation of ice and snow over thousands of years. . 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. another.. 2 . kinds:. 1) . Rill erosion. is the erosion by running water in small channels. , on the side of a slope.. 2) . Gully erosion. is when a rill channel evolves to become deep and wide.. Glacier – thick ice mass that forms over hundreds or thousands of years.. 15, 000 years ago > 30 % coverage - Today 10 % coverage. Valley Glaciers. Ice Sheets. Types of Glaciers. Valley Glaciers. 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. Glaciers. Geologists define a . glacier. as any large mass of ice that moves slowly over land.. There are two types of glaciers:. Continental glaciers. Valley glaciers. Continental Glaciers. A . continental glacier. 2. Rocks & Landforms. 3 influences. Crust movement = Landform creation (endogenic). Rock movement. Reactions to crustal stresses. Weak (greatly affected by weathering & erosion). Strong (less affected by weathering & erosion). 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.