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Pressure from water and top layers over thousands of years causes lower layers to stick together and form what?
The Answer Is Compaction.(:
How is a glacier fromed?
A glacier is formed from the accumulation and compaction of snow over many years. As layers of snow build up, the weight compresses the lower layers into dense ice. This process occurs in areas where snowfall exceeds melting, typically in polar regions and high mountains. Eventually, the ice begins to flow under its own weight, creating the characteristic movement of a glacier.
How snow turns into glacier?
Snow turns into glaciers when layers of snow accumulate and compress over time. As more snowfall builds up, the weight and pressure cause the lower layers to compress into ice. This process slowly transforms the fluffy snow into dense glacial ice, which can eventually flow downhill due to gravity, forming a glacier.
How is a glacier formed the melting and refreezing of snow the weathering and erosion of snow the erosion and deposition of ice the melting and precipitation of snow?
A glacier is formed through the accumulation of snow that compresses into ice over time. As more snow falls and compacts, it displaces air and forms glacial ice. This process is aided by the weight of the overlying snow, which causes the lower layers to compress and recrystallize into ice.
How can the geologist estimate how long ago the glacier was in the lower part of the valley?
A geologist can estimate how long ago a glacier was in the lower part of the valley by using methods such as radiocarbon dating of organic materials found in sediment layers or moraines left by the glacier. They may also analyze landforms and sediment deposition patterns to identify the glacier's extent and retreat. Additionally, studying the soil development and vegetation succession in the area can provide insights into the time elapsed since glacial retreat. Together, these methods help establish a timeline for the glacier's presence in the valley.
What is the lower end of a glacier called?
The area that is melting faster than it is accumulating is the "Zone of Ablation." The very bottom end of a glacier is typically called its "foot."
What is a glacier snout?
A glacier snout is the terminus or end point of a glacier where ice and meltwater are released. It is where the glacier meets lower elevations and warmer temperatures, causing melting and ice loss. The snout can vary in shape and size depending on the glacier's dynamics.
What happenes as lower layers of air are warmed?
When lower levels of air are warmed they rise into upper atmospheres. As warm air rises, it causes wind. If the warm air is moist, it will cause thunderstorms and possibly even tornadoes if it rises quickly enough.
Why is the weight of snow needed to make glacier ice?
The weight of accumulated snow compresses lower layers, causing them to undergo a process called firnification, where air is squeezed out and the snow turns into firn, a dense, grainy type of snow. Over time, this firn further compresses into glacier ice due to the pressure and weight of the overlying snow and ice layers.
How are glaciers formed?
Glaciers are formed when snow accumulates over time, compresses into ice, and begins to flow under its own weight. This gradual process of snow compaction and ice formation creates thick masses of ice that move downhill due to gravity. Glaciers are typically found in polar regions, high mountains, and other cold environments where snowfall exceeds melting.
Can mayonnaise cause stretch marks?
No, stretch marks are caused by tears in lower layers of the skin. This is caused by a gain in mass that causes the skin to stretch more than the lower layers are capable, as they are not as elastic as the top layer. This can be caused by weight gain, increase in muscle, or pregnancy.
Why is the glacier melting a threat to water supplies?
The lower parts of glaciers melt and the water flows to fill the rivers downstream. If global warming causes the whole glacier to melt, then the rivers will lose their mountain supply and the lives of people downstream, who rely on water for living and agriculture will be threatened.
