What are the main features formed by a river in its entire course?

Upper course river features include steep-sided V-shaped valleys, interlocking spurs, rapids, waterfalls and gorges. Middle course river features include wider, shallower valleys, meanders, and oxbow lakes. Lower course river features include wide flat-bottomed valleys, floodplains and deltas.

What land features are formed by ice?

Glacier Landforms

• U-Shaped Valleys, Fjords, and Hanging Valleys. Glaciers carve a set of distinctive, steep-walled, flat-bottomed valleys. …
• Cirques. …
• Nunataks, Arêtes, and Horns. …
• Lateral and Medial Moraines. …
• Terminal and Recessional Moraines. …
• Glacial Till and Glacial Flour. …
• Glacial Erratics. …
• Glacial Striations.

What are 4 glacial features that have been deposited by ice?

Some examples of depositional features include: hummocky moraines (high-relief forms consisting of mounds, ridges and knobs, some of which are doughnut-shaped); cross-valley, ribbed, washboard, De Geer, push, ice-thrusted, and recessional moraines (bow-shaped ridges of varying heights and lengths); terminal moraines ( …

What is a glacial feature?

Glacial features are identified from a combination of morphology and ground verification that generally includes examination of available outcrop. Features such as circular depressions on an outwash plain are related to the mode of formation (in this case the melting of buried ice) and can be mapped straightforwardly.

Which features are commonly created by alpine glaciers?

Alpine glaciers pluck and grind up rocks creating distinctive U-shaped valleys and sharp mountain peaks and ridges. A cirque is a bowl-shaped hollow found high up on the side of a mountain.

What features are formed by glacial erosion?

As the glaciers expand, due to their accumulating weight of snow and ice they crush and abrade and scour surfaces such as rocks and bedrock. The resulting erosional landforms include striations, cirques, glacial horns, arêtes, trim lines, U-shaped valleys, roches moutonnées, overdeepenings and hanging valleys.

What is ice erosion?

Ice erosion occurs in one of two forms, the movement of glaciers, or thawing processes. In the latter formation, water inside pores and rock fractures expand, which causes further cracking. Glaciers erode through one of three different processes, including abrasion, plucking, and thrusting.

Which feature is not formed by glacial erosion?

Which feature is not formed by glacial erosion? Col. Hanging valley.

Are features caused by erosion by alpine glaciers?

Alpine Glacial Erosion Features. Alpine glaciers produce very different topography than continental glaciers. Alpine glaciers produce wide valleys with relatively flat bottoms and steep sides due to the erosion that occurs at the base and edges of the glaciers. These are known as U-shaped valleys (Figure 17.17).

Which features are formed by river erosion check all that apply?

Through erosion, a river creates valleys, waterfalls, flood plains, meanders and oxbow lakes.

Is Kettle erosion or deposition?

Glaciers cause erosion by plucking and abrasion. 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.

Why is ice an agent of erosion?

Like flowing water, flowing ice erodes the land and deposits the material elsewhere. Glaciers cause erosion in two main ways: plucking and abrasion. Plucking is the process by which rocks and other sediments are picked up by a glacier. They freeze to the bottom of the glacier and are carried away by the flowing ice.

Is ice a rock?

Snow, lake ice, and glaciers also fit the definition of a rock. They are naturally occurring (not man-made), solid (not liquid, gas, plasma, etc.), and they can form large deposits. Snow, lake ice, and glaciers fit the definition, so they are rocks.

Why ice is a mineral?

Ice is a naturally occurring compound with a defined chemical formula and crystal structure, thus making it a legitimate mineral. Its only limitation, in comparison to all other minerals, is that it is not stable at room temperature. Ice is colorless, unless impure. Flaws and cracks cause it to have a white color.

What minerals are found in ice?

Glacier ice is actually a mono-mineralic rock (a rock made of only one mineral, like limestone which is composed of the mineral calcite). The mineral ice is the crystalline form of water (H₂O). Most glacier ice forms through the metamorphism of tens of thousands of individual snowflakes into crystals of glacier ice.