Question

explain five theories used to explain the occurrence of glaciation

Answer 1

Answer:

Glacial Theory. a system of scientific concepts concerning the repeated development of glaciers that covered enormous areas of the earth.

Ice age glaciers caused erosion and deposition, which resulted in unique features such as horns, cirques, lakes, U-shaped valleys, moraines and drumlins. Indirect effects include pluvial lakes, isostatic depression and a change in sea level.

Glaciers can be thought of as moving mountains of ice. As they move over the landscape, they cause glacial erosion, which is defined as the carving and shaping of the land beneath a moving glacier. Abrasion is the erosion that occurs when particles scrape against each other. It works in a similar fashion to sandpaper.

Explanation:

A glacier forms when snow accumulates over time, turns to ice, and begins to flow outwards and downwards under the pressure of its own weight. In polar and high-altitude alpine regions, glaciers generally accumulate more snow in the winter than they lose in the summer from melting, evaporation, or calving

Answer 2

• The process or state of being covered by glaciers or ice sheets. 'These hydrogeological conditions are controlled by relative land and sea level, erosion and deposition, the cold climate processes of permafrost and glaciation, and rock stress changes.
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