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What conditions cause glaciers A to grow larger and advance b to shrink and recede?

Glacial Advance and Retreat Glaciers grow (advance) and shrink (retreat) as a result of precipitation, melting and sublimation—all while slowly sliding down their valleys. Local and global climate changes cause the changes this dynamic system.

What conditions cause glaciers?

Three conditions are necessary to form a glacier: (1) Cold local climate (polar latitudes or high elevation). (2) snow must be abundant; more snow must fall than melts, and (3) snow must not be removed by avalanches or wind.

What conditions encourage glacier growth and glacier retreat?

As long as snow accumulation equals or is greater than melt and ablation, a glacier will remain in balance or even grow. Once winter snowfall decreases, or summer melt increases, the glacier will begin to retreat.

How do you know if a glacier is advancing or retreating?

With the exception of glaciers that terminate in the ocean, and glaciers in the polar regions or at extreme high altitudes where the temperature is always below freezing, essentially just two things determine whether a glacier is advancing or retreating: how much snow falls in the winter, and how warm it is during the …

What is the difference between a valley glacier and a continental glacier?

Continental glaciers are large ice sheets that cover relatively flat ground. These glaciers flow outward from where the greatest amounts of snow and ice accumulate. Alpine (valley) glaciers flow downhill. Ice accumulates near the top of a mountain and then travels down existing valleys (Figure below).

What kind of landforms would indicate the prior existence of a continental glacier?

What kind of terrain and landforms would indicate the prior existence of a continental glacier? A. Large, flatten area with kettles, drumlins, eskers, till, erratic, an end moraines.

What landforms are created by glacial erosion and deposition?

The resulting erosional landforms include striations, cirques, glacial horns, arêtes, trim lines, U-shaped valleys, roches moutonnées, overdeepenings and hanging valleys. U-shaped, or trough, valley: U-shaped valleys are created by mountain glaciers.

Why are eskers sinuous?

More than a thousand eskers have been found in Michigan. sandy or gravelly ridges that look like upside-down stream beds after the glacier melts away. The ice that formed the sides and roof of the tunnel subsequently disappears, leaving behind sand and gravel deposits in ridges with long and sinuous shapes.

Is Cirque erosion or deposition?

Valley glaciers form several unique features through erosion, including cirques, arêtes, and horns. Glaciers deposit their sediment when they melt. Landforms deposited by glaciers include drumlins, kettle lakes, and eskers.

What are the four main causes of soil erosion?

The agents of soil erosion are the same as the agents of all types of erosion: water, wind, ice, or gravity. Running water is the leading cause of soil erosion, because water is abundant and has a lot of power.