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.
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.
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 a melting glacier accumulates sand, gravel, and rocks, it forms a landform called a moraine. There are different types of moraines such as terminal, lateral, and medial moraines, depending on where they are deposited in relation to the glacier.
Plucking is a form of glacial erosion where a glacier will pick up and carry pieces of bedrock as it moves. This process occurs when meltwater at the base of the glacier freezes onto the rock, and as the glacier moves, it pulls these frozen rock pieces along, causing erosion. Plucking can result in the removal and transportation of large rock fragments by glaciers.
The name of a glacier that has frozen to bedrock is rock glacier. A rock glacier is formed by angular blocks of frozen rock that form in the valley of glaciers.
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.
Which two spheres interact when a glacier erodes rock
No, a glacier is not called a rock. A glacier is a large mass of ice that moves slowly over land due to gravity. Rocks may be found within or on top of a glacier, but the glacier itself is made of ice.
The feature that is the result of a glacier carving out rock as it moves is a roche moutonnees. It is a rock formation created by the passage of glacier ice. Or a terminal moraine
Meltwater streams formed by melting ice when a valley glacier stops advancing are called proglacial streams. These streams are commonly found at the terminus of a glacier where melting ice produces large volumes of water that flow down the valley.
Plucking is the process in which a glacier freezes around cracked and broken rock and when it moves downhill, the rock is plucked from the back wall of the glacier.
The feature that is the result of a glacier carving out rock as it moves is a roche moutonnees. It is a rock formation created by the passage of glacier ice. Or a terminal moraine