geomorphology & earth landforms section 9 MCQ Questions & Answers Detailed Explanation

Answer: (c)

Anthracite is usually considered to be the highest grade of coal and is actually considered to be metamorphic.

Compared to other coals it is much harder, has a glassy lustre, and is denser and blacker with few impurities. It is largely used for heating domestically as it burns with little smoke.

Answer: (d)

Answer: (b)

A hanging valley is a tributary valley with the floor at a higher relief than the main channel into which it flows. They are most commonly associated with U-shaped valleys when a tributary glacier flows into a glacier of larger volume.

The main glacier erodes a deep U-shaped valley with nearly vertical sides while the tributary glacier, with a smaller volume of ice, makes a shallower U-shaped valley. Since the surfaces of the glaciers were originally at the same elevation, the shallower valley appears to be ‘hanging’ above the main valley

Answer: (d)

Answer: (a)

New folded mountains are also caller Tertiary Mountains. All the old folded mountains were originated before the Tertiary period. The folded mountains of Caledonian and Hercynian mountain-building periods come under this category.

These mountains have been so greatly denuded that they have now become relict folded mountains, for example, Aravallis, Vindhyachal etc.

The Alpine folded mountains of the Tertiary period arc grouped under the category of new folded mountains, for example, Rockies, Andes, Alps, and Himalayas etc.

Answer: (c)