CK12 Earth Science

Figure 10.32: This crescent shaped dune forms from constant winds moving sand over hard ground. ( 35 ) Loess In many parts of th ...

Figure 10.33: These vertical cliffs are formed from fine grained, windblown silt and clay. ( 39 ) Lesson Summary Wind can carry ...

bed load The portion of sand carried by wind as grains roll, bump and jump along the ground surface. deflation The process of wi ...

10.4 Glacial Erosion and Deposition Lesson Objectives Discuss the different erosional features formed by alpine glaciers. Descr ...

Figure 10.34: This valley in Glacier National Park shows the characteristic ‘U’ shape of a glacially carved valley. ( 23 ) Figur ...

Glacial Erosion The two main ways that glaciers erode the underlying rock areabrasionandplucking. As the thick layer of ice push ...

Figure 10.37: The Matterhorn in Switzerland is a classic example of a horn. ( 16 ) As glaciers flow down a mountainside, the ice ...

Figure 10.38: When glaciers move down opposite sides of a mountain, a sharp edged ridge forms between them. ( 22 ) Figure 10.39: ...

Figure 10.40: These long, dark lines on the Aletsch glacier in Switzerland are examples of medial and lateral moraines. ( 13 ) g ...

these large rocks are a different type of rock than the bedrock in that area, they are called glacial erratics(Figure10.42). Sci ...

they were thought to have drifted in on icebergs. They correctly understood that only ice could have brought these materials, bu ...

Figure 10.43: An esker is a winding ridge of sand and gravel deposited under a glacier by glacial meltwater. ( 45 ) ...

the furthest reach of the glacier, as meltwater streams spread material out forming a broad plain called anoutwash plain(Figure1 ...

with glaciers producing lots of melting water, lighter colored sands are deposited on top of the darker layers at the bottom of ...

cirque Steep sided, bowl shaped depression formed as a glacier plucks and erodes under- lying bedrock. drumlin An asymmetrical h ...

Points to Consider What features would you look for around where you live, to determine if glaciers had ever been present there ...

movement, like your notebook falling to the floor, but slowly your friend is no longer sitting up straight in the seat. The same ...

Figure 10.46: The slope of underlying materials must be considered when making road cuts. ( 43 ) One well known cause of landsli ...

Figure 10.47: It is important to reinforce a slope that has been cut away in order to prevent landslides. ( 19 ) ...

Figure 10.48: Pieces of rock regularly fall to the base of cliffs and form slopes known as talus slopes. ( 20 ) ...