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Question

Write a note on the continental drift theory.

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Solution

Instruction:
Introduce the person behind this theory(1M)
Write down the key features of his postulate(4M)

Solution:
  • The continental drift theory was postulated by a German meteorologist and geophysicist Alfred Wagener to describe and partially explain the present arrangement of continents and ocean basins.
  • He postulated that a massive supercontinent, named Pangaea existed 220 million years ago.
  • According to Wegener, Pangea broke into sections that drifted apart. The two sections were as follows:
  1. Laurensia which consists of present North America, Greenland, and all of Eurasia north of Indian subcontinent.
  2. Gondwana-land which contains South America, Africa, Madagascar, India, Arabia, Malaysia, East Indies, Australia and Antarctica.
  • These two blocks were separated by a long shallow inland sea called the Tethys Sea.

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