2016-03-29

Glaciologi och glacial erosion. Ca 75% av jordens sötvatten är bundet i glaciärer och inlandsisar. Nunataker på västra Grönland. Ca 300 glaciärer i Sverige.

what is a process whereby glaciers mechanically erode the landscape by picking up rock material and carrying it away? plucking Glaciers usually flow at predictable speeds, but when they do advance rapidly, what is it called? When a large amount of plucking has occurred this increases the rate of abrasion as more rock is embedded in the base of the glacier. At the top end of the glacier, the ice doesn’t move in a straight line — it moves in a circular motion called rotational slip. This can erode hollows in the landscape and deepen them into bowl shapes called corries. Answer: Glaciers erode land through Plucking and Abrasion.

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Kollisionszon Glacial erosion. Packad is och snö  Flip. Space. Profile Picture.

The two processes by which glaciers erode the land are. Sediment. When a glacier melts, it deposits the _____ it eroded from the land, creating various landforms

When gravity causes ice to move down the side of a mountain there are two ways in which the rock below is eroded. These are plucking and abrasion .

How do glaciers erode the land? When gravity causes ice to move down the side of a mountain there are two ways in which the rock below is eroded. These are plucking and abrasion .

glacial deposition → morän, morän är det material som varit fruset i isen. Erosion. "Plockning", tar med sig material från ytan det rinner över. vanligaste sättet är att när vatten Via fotosyntesen kommer CO2 och H2O att omvandlas till druvsocker och O2, dessa kommer om det händer på land ex great rift valley, Afrika. rinnande vatten, kustprocesser och glacial erosion. Erosionsbas. Basnivå Magma från jordens inre som nått jordytan via sprickor eller en vulkans krater.

Glaciers wear deep valleys in the landscape. Next Question > U-shape. Glaciers push through the land leaving a U-shaped valley. Next Question > V-shape. Narrow V-shaped gorges are worn by streams and rivers high in mountains. Next Question > X-shape. There’s no such thing as a X-shaped valley!
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Over time rivers slow in their erosion of the geography around them but are never quite done changing the landscape completely. Young rivers erode the rock and soil quickly in order to achieve equilibrium between the altitude of their headwaters and their final expulsion at sea level. Glaciers primarily erode through plucking and abrasion. Plucking occurs as a glacier flows over bedrock, softening and lifting blocks of rock that are brought into the ice. The intense pressure at the base of the glacier causes some of the ice to melt, forming a thin layer of subglacial water.

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Study Chapter 4 -Glacial and Arid Landscapes flashcards from Lee Bratcher's class online, or in Brainscape's iPhone or Android app. Learn faster with spaced repetition.

Most glacial troughs start out as v-shaped valleys.

The two main processes that lead to glacial erosion are plucking and abrasion. Plucking is the process by which a glacier picks off rocks as it blocks over the land. The rock fragments freeze to the bottom of the glacier, gouging and scratching the bedrock as the glacier advances in the process of abrasion.

Some of the boulders they carry are as big as houses. Rocks carried hundreds and even thousands of kilometers by glaciers are called glacial erratics. Glaciers not only transport material as they move, but they also sculpt and carve away the land beneath them. A glacier's weight, combined with its gradual movement, can drastically reshape the landscape over hundreds or even thousands of years.

Glaciers erode and deposit telltale landforms. They show the direction a glacier flowed and how far it advanced. They create fantastic and unique features in mountain areas. Glaciers erode land through Plucking and Abrasion. Answer: Option C. Explanation: Glaciers are mass form of ice found in the high altitudes. During summer the glaciers melt down and rich source of pure water is obtained.