Question

Which of the following was not a geological clue used to support the theory of continental drift?

A.
Rocks of the same composition and age were found in Brazil and South Africa.
B.
Fossils of the reptile Lystrosaurus were found on the landmasses of Africa, India, and Antarctica.
C.
Fossils of the plant Glossopteris were found on the landmasses of South America, Africa, India, Antarctica, and Australia.
D.
Samples of ocean water tested off the coast of South America contained the same salt content as oceans near Africa.

Answer 1

Answer:

Option (D)

Explanation:

The theory of continental drift refers to the large scale movement of continents over the vast ocean water bodies and was discovered by Mr. Alfred Wegener.

He proposed various evidences in support of this theory, of which some includes-

• Similar fossil assemblages were found in different continents.

• Similar rock types were found in distant continents.

• Matching of the continental margins.

These are some of the pieces of evidence that strongly suggested the theory of continental drift theory.

In order to justify the continental drift theory, the salt composition of the ocean in various parts of the world was not studied, so it is not a clue that was used in order to support the continental drift theory.

Thus, the correct answer is option (D).

Answer 2

Answer:

D. Samples of ocean water tested off the coast of South America contained the same salt content as oceans near Africa.

Explanation: