Glacial Geomorphic Processes
Glaciers are effective agents of landscape change.The slow and gradual movement of ice down a valley causes something called abrasion. Abrasion is where it creates and produces fine sediments, which is also known as glacial flour. When the debris transported by the glaciers, when the glacier withdraws, it is termed and known as a moraine. As for the U-shaped valleys, it is formed because of glacial erosion. As for the V-shaped valleys, it was made from fluvial origin.
The way glacial processes interact with other landscape elements (eg. hillslopes) is an important aspect for a place known as Pilo-Pleistocene since it affects the landscape evolves and also, its sedimentary record in many high mountain environments. Environments that have been relatively recently glaciated but are no longer may still show elevated landscape change rates compared to those that have never been glaciated.Nonglacial geomorphic processes which nevertheless have been conditioned by past glaciation are termed paraglacial processes. This concept contrasts with periglacial processes, which are directly driven by formation or melting of ice or frost. Glacial erosion has two major ways of EROSIONAL processes that occur at the base of a glacier. The first process: at the base of a glacier, large amounts of loose rocks and sediments are incorporated into the moving glacial ice by partial melting and refreezing. The second process: it involves the abrasive action of the held rocks and sediments held by the ice on the surface underneath the glacier. This process is AKA scouring. |