Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
805 views
in Agents of Erosion by (58.5k points)
closed by

Describe the topographies formed by glaciers.

1 Answer

+1 vote
by (42.9k points)
selected by
 
Best answer

In high latitudinal regions or high relief regions, due to less- temperature, process of glaciation takes place. Presence of glaciers in such regions is a common phenomenon. Glacier is such stock of ice, which gradually shifts from its original place on the earth’s surface. In snow – covered regions, glaciers erode the rocks while performing corrasion and attrition and deposit moraines in various forms. 

Through these processes, two types of topographies are formed:

1. Erosional topographies, 

2. Depositional topographies.

Both these types of topographies have been described in the following form:

1. Erosional Topographies:

(a) U – Shaped valley: U – shaped valleys are formed when a glacier travels across and down a slope, carving the valley by the action of scouring. 

(b) Hanging valley: In the U – shaped major deep valley, its assisting glacier valley appears to be hanging above it. 

(c) Cirque: This is an easy – chair – shaped trough formed by the glacier. 

(d) Tarn: This is a lake formed by filling up of water in the cirque basin. 

(e) Nunatak: Projected mounds in glacial regions are known as nunataks. 

(f) Col: This is a traverse path formed by the conjunction of two adjacent cirques. 

(g) Crag and Tail: A rocky outcrop with a tapering ridge of glacial deposits extending to one side is known as crag and tail. 

(h) Sheep rock: This is a sheep-back shaped rock formed by glacial erosion. 

(i) Fiord: These are scraped coasts formed by glaciers due to submergence of valleys.

2. Depositional Topographies:

(a) Moraine: Deposits of pebbles, stones and boulders deposited by glaciers are known as moraines. These get deposited on the sides, back or bottom of the glacier. 

(b) Esker: These are long, narrow and wavy ridges formed by the deposit of glacial alluvium. 

(c) Kame: These are steep – sloped mounds formed by glacial alluvium. 

(d) Kettle: These are troughs formed by melting of glaciers.

(e) Drumlin: Egg – basket shaped structure formed by deposit of boulder bodies is known as drumlin.

(f) Glacial outwash plains: These are fan – shaped plains formed by the spread of debris to distant places due to flow of glacial water.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...