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The embedded rocks grind away the bedrock beneath the glacier, leaving scratches, striae, on the rock.
In doing this, they tend to round off the corners of all but the largest boulders, and produce huge quantities rock flour. The smaller rocks tend to polish the basement.
If upstream there is a harder rock, such as volcanic or granite, then the bed will be more deeply excavated than if all the grind stones are homogeneous.
The rocks enter deeply into the glacier at bergschrunds (crevasses at glacier edge), or through ordinary crevasses where the glacier goes over a step in its bed.
What else can I help you with?
Removal of rock by an advancing glacier?
Actually, when first advancing, a glacier will just over ride obstacles in front of it. It will NOT bulldoze them. There are lots of good photos of this. Ask your tame glaciologist. Eventually, when the glacier fully covers an obstacle, the rocks embedded in the glacier and those at the base, will grind away at the obstacle.
Abrasion and plucking involves what part of glacier?
The base of the glacier, where it is in contact with the rocks beneath it.
Rock are carried along inside an and drop off as it melts?
This describes glacial erosion where rocks are frozen into the base of a glacier and then deposited as the glacier melts, leaving behind a trail of rocks.
Will plucking occur if a glacier is NOT advancing?
Plucking can still occur even if a glacier is not advancing. Plucking is more influenced by the presence of meltwater and the freezing and thawing of water in crevasses than the overall advance or retreat of the glacier.
How do you tell if a valley glacier is advancing or retreating?
Valley glaciers are typically advancing when their terminus is pushing forward, causing the glacier to grow in size. Conversely, they are retreating if the terminus is melting or receding, leading to a decrease in glacier size. Monitoring changes in the glacier front position over time can help determine if it is advancing or retreating.
When the base of a glacier melts and refreezes it will likely pick up some rocks. this process is called?
Wish
When the base of a glacier melts and refreezing it will likely pick up some rocks this process is called what?
Wish
When glaciers melt do they leave rocks behind?
Yes, When the glacier melts, all the rocks underneath are still there.....AnswerYes rocks melt out of Glaciers. The main types I can remember:Glacial till ( rocks left as an even bed )Erratics are large rocks (Boulder's) left scattered aboutLateral moraine's. These are drifts of rocks left where a stream has melted and cut a route through the glacier or the edges of where the glacier got to or whereTerminal Moraine is where a Glacier got to and stopped advancing or retreating for a time thus plowing up a big long narrow pile of rock.
What is a glacier plucking?
When a glacier scrapes along the ground, it plucks rocks out of the ground underneath them, then carries on advancing until it melts and then deposits those rocks even thousands of km from where they were picked up, giving rise to the term alien/erratic rocks (a rock which has been moved from its origin by natural processes and deposited in an area which it doesn't 'belong' geologically).
When a glacier melts the rocks it carried fall to the ground in a jumble called what?
When a glacier melts, the rocks it carried may fall to the ground in a jumble called a moraine. This accumulation of rock, debris, and soil can form a moraine deposit at the edge or base of a glacier.
What is the term used to describe the movement of a glacier around small obstacles at its base?
The term used to describe the movement of a glacier around small obstacles at its base is called "plucking." This process involves the glacier lifting and carrying rocks and debris as it flows over and around obstacles.
How can glaciers erode rocks?
The glacier can carry rocks. The moving of the glacier.
