How do glaciers work?
Glaciers move by internal deformation of the ice, and by sliding over the rocks and sediments at the base. Internal deformation occurs when the weight and mass of a glacier causes it to spread out due to gravity. Sliding occurs when the glacier slides on a thin layer of water at the bottom of the glacier.
What happens when a glacier carrying sediments melts?
Glaciers can carry rocks of any size, from giant boulders to silt. The glacier may carry the rocks for many kilometers over many years. Glaciers deposit the sediment when they melt. They drop and leave behind whatever was once frozen in their ice.
What would be the best reason for finding a bunch of broken rocks underneath a melted glacier?
This is because as the glacier melts, water seeps into cracks on the rock underneath the glacier. As this water seeps into the cracks, it would be turned into ice. As the ice expands, it causes the rock to break up into pieces. This process is called mechanical weathering.
What are the main features of 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 it called when a glacier picks up rocks?
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 gravity an agent of erosion?
Gravity can cause erosion and deposition. Gravity makes water and ice move. It also causes rock, soil, snow, or other material to move downhill in a process called mass movement.
Which agents of erosion are in UAE?
Winds are an active agent of erosion in UAE. UAE is a desert area which is dry and arid. Often dry and hot winds blow creating erosion.
What are the methods of soil conservation?
List out three methods of soil conservation
- Following methods are normally adopted for conserving soil:
- Afforestation:
- Checking Overgrazing:
- Constructing Dams:
- Changing Agricultural Practices:
- (i) Crop Rotation:
- (ii) Strip Cropping:
- (iii) Use of Early Maturing Varieties: