Is a hanging valley formed by erosion or deposition?

Is a hanging valley formed by erosion or deposition?

U-shaped valleys, hanging valleys, cirques, horns, and aretes are features sculpted by ice. The eroded material is later deposited as large glacial erratics, in moraines, stratified drift, outwash plains, and drumlins. Varves are a very useful yearly deposit that forms in glacial lakes.

Why are waterfalls formed in hanging valley?

Rivers form as the snow from the upper slopes of the mountains melts, and flow along the hanging valleys. Upon reaching the mouth of the hanging valley, where the valley meets the steep walls of the main valley, the river drops to form a waterfall.

When were hanging valleys created?

waterfalls are most common where hanging valleys occur. Such valleys generally form when glacier ice deeply erodes a main or trunk valley, leaving tributary valleys literally hanging far above the main valley floor. After the glaciers have melted and withdrawn, streams from such tributary valleys must fall in order to…

How are hanging valleys made?

A hanging valley is a smaller side valley left ‘hanging’ above the main U-shaped valley formed by a tributary glacier. They are formed when glaciers move through the main valley and cut off spurs. A ribbon lake is a large, narrow lake occupying a U-shaped valley.

How are hanging valleys formed?

How was hanging valley formed?

They are formed in river valleys which, during the ice age, have been filled by a large glacier . These glaciers have deepened, straightened and widened the valley by plucking and abrasion. A hanging valley is a smaller side valley left ‘hanging’ above the main U-shaped valley formed by a tributary glacier.

How are hanging valley formed by glaciers?

Hanging valleys are formed as a result of the erosion effects of glaciation. The valleys are thought to have been formed by two different glacier flows that interact with each other. A glacier with the relatively small amount of material flows into the main glacier with the more glacial material.

How do glaciers form hanging valleys?

What is hanging valley?

Definition of hanging valley : a valley whose lower end is notably higher than the level of the valley or the shore to which it leads.

When were hanging valley created?

How are hanging valleys different from valley glaciers?

Hanging valleys Large valley glacier systems consist of numerous cirques and smaller valley glaciers that feed ice into a large trunk glacier. Because of its greater ice discharge, the trunk glacier has greater erosive capability in its middle and lower reaches than smaller tributary glaciers that join it there.

What happens to the floor of a you shaped valley?

When the glaciers retreat from the area where they formerly met, the floor of the u-shaped valley formed by the smaller glacier may be many feet above the main valley. Waterfalls often form at this point when rivers begin flow through the glacier valleys.

Where are glaciers that carve you shaped valleys?

Avalanche Lake (Glacier National Park, Montana) sits at the mouth of a classic U-shaped, glacially-carved valley. Valley glaciers carve U-shaped valleys, as opposed to the V-shaped valleys carved by rivers.

What happens to a glacier when it freezes?

The freeze/re-freeze glacial conveyor belt scours valleys into a U-shape, broad at the bases and sheer on the sides. The result (when the glacier is gone) is awesome verticality and/or long, deep lakes like Lake McDonald and Bowman. Bird Woman Falls flows from a U-shaped valley “hanging” above a larger U-shaped valley.