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The thick layer of ice produces the polished look on solid rock by scraping the rock as it moves over it

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Q: What produces the scraping action that often causes a polished look on solid rock over which a glacier has moved?
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How are rocks polished?

Rock is polished, either naturally, or by human activity, by abrasion or tumbling action.


Is glacier action chemical weathering or mechanical weathering?

Mechanical weathering for example freeze-thew process or abrasion.


Why would it be hard to see glacial erosion in action?

Because the glacier moves to slow to be noticed without instruments


What is a Medial moraine?

Moraine are the rock and soil debris deposited on the surface of a glacier by avalanches and landslips. Those at the edges (the first formed) are Lateral moraine. Those at the terminus of the glacier are Terminal moraine. Where two glaciers join, then their lateral moraines join to become a Medial moraine, i.e. 'middle'. The moraine overburden lodged towards the head of a glacier, tends to slip down the schrunds and is a major erosive component in the abrasive action. Where the glacier travels over a step in its bed, an ice-fall is created, marked by a crevasse jumble, and into this much other moraine is embedded into the traveling glacier. It is remarkable to realize that most of the cross-section of the U-shaped of a glacier's valley has been removed by abrasion - converted into rock flour.


What landforms does glacial erosion create?

Two major erosional processes occur at the base of a glacier. First, at the base of a glacier, large amounts of loose rock and sediment are incorporated into the moving glacial ice by partial melting and refreezing. The second process of erosion involves the abrasive action of the held rock and sediment held by the ice on the surface underneath the glacier. This abrasive process is known as scouring.

Related questions

How are rocks polished?

Rock is polished, either naturally, or by human activity, by abrasion or tumbling action.


Is the bolt shroud on a Browning Safari Sako Action chromed or highly polished steel?

Polished


What part of speech is it in the sentence silver will tarnish if it is not polished often?

The word "tarnish" in the sentence "the silver will tarnish if it is not polished often" is a verb. It is describing the action of the silver in the sentence.


What part of speech is polish in the sentence silver will tarnish if it is not polished often?

The word "tarnish" in the sentence "the silver will tarnish if it is not polished often" is a verb. It is describing the action of the silver in the sentence.


Use the word dichotomy in a sentence?

"The dichotomy between thought and action is profound, in that thought produces nothing, whereas action produces something".


Is lake Baikal a glacier lake?

Lake Baikal ia a Fault Action/Rift Valley.


What is a glacier byproduct?

glacial moraine is the debris of rock and gravel brought down a mountain by the action of the glacier and deposited at it's foot.Melt water also forms the head waters of a river


What is an effect that adhesion produces?

Adhesion produces capillary action. Capillary action is liquid's ability to flow in narrow spaces without external forces like gravity.


What is an Corrie and how is it formed?

Corries or Cirques are bowl like hollows in a mountain range, formed by the action of a small glacier.


Is glacier action chemical weathering or mechanical weathering?

Mechanical weathering for example freeze-thew process or abrasion.


Why would it be hard to see glacial erosion in action?

Because the glacier moves to slow to be noticed without instruments


Is a U-shaped valley constructive or destructive?

A U-shaped valley is considered a glacial landform resulting from the erosive action of a glacier. It is classified as a destructive force as the glacier carves and deepens the valley by plucking, abrasion, and glacial erosion.