1.Which of the following best describes glacial till? finely laminated layers of

Question

1.Which of the following best describes glacial till?

finely laminated layers of mud

well-sorted sand

a broad area of gravel and sandbars

poorly sorted, unconsolidated rock

wind-deposited clay and silt

2.Which of the following is a glacial landform?

drumlins

eskers

kettle Lakes

moraines

all of the above

3.Growth of continental glaciers has which of the following effects?

uplift of the lithosphere by elastic rebound

rise in sea level

formation of large lakes

decrease of Earth's albedo

All of the above

finely laminated layers of mud

well-sorted sand

a broad area of gravel and sandbars

poorly sorted, unconsolidated rock

wind-deposited clay and silt

Explanation / Answer

1. Which of the following best describes glacial till?

Ans. Poorly sorted, unconsolidated rock. This is generally produced by eosion of moving ice. It is generally unsorted sediments.

2. Which of the following is a glacial landform?

Ans. All of the above landforms are glacial landform.

3.Growth of continental glaciers has which of the following effects?

Ans. Formation of large lakes. There is erosion of the surface over which the glacier moves, and formations of depressions. These depressions are filled by water and lake formes.

Uplift of the lithosphere by elastic rebound. Due to weight of ice continents depressed, and land will rebound when there is melting of ice. So, it is a post glacial rebound, i.e., it is a post glacial effect.

Decrease of Earths albedo. It is wrong, because albedo is the fraction of solar energy reflected back to the space from earths surface, and it will increase if there is increase of ice. When ice will melt and there will addition of water then there is decrease of Earths albedo. Because radiation is absorbed by water.

Rise in sea level will occur when there is melting of continental glaciers.

So, if it is post glacial effects, i.e., melting of these ice, then answer is all of the above. Otherwise it is simply formations of large lakes.

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