Monthly archives: May, 2021

Ice age

The Pleistocene epoch is called an ”Ice Age”. The Ice Age began at least 2.5 million years ago and had a duration of a million years. The most recent retreat of ice had taken place between 10,000 and 15,000 years ago. The areas which were extensively buried by ice sheets included northern North America, Northern …

Glacial Deposits and glacial landform

The regions that were formerly covered by ice are characterized by the following features; The topography generally lacks an organized drainage network. There are hollows with no outlets some of which form lakes. In some places, there are isolated hills, in others long and winding ridges, none of which seem to have much relation to …

Transport by Glaciers

Glaciers acquire a huge amount of rock debris by plucking, abrasion, and frost wedging. This material is transported in three ways. (i). Super Glacial Load: The debris that falls from the valley walls on the glacier surface, is transported as a conveyor belt. Such debris is known as “Super Glacial Load”. (ii). Englacial Load: Sooner …

Glacial Erosion

Glaciers are the best example of mass movement. The work of the glaciers also drifts huge rock material with themselves. The heavy rock material movement also eroded some parts of the bedrocks known as Glacial Erosion. The glaciers cause erosion in three ways: (i) by plucking or quarrying, (ii) by abrasion, and (iii) by frost …

Mass movement processes and landforms

Mass movement is the downslope movement of the rock debris in response to gravity without the direct aid of other media such as air, water, ice, and ground shaking (still these factors contribute to the process of mass movement). Downslope movement occurs when the gravitational driving force exceeds the frictional resistance of the material resting …