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Question

With reference to Sea Floor Spreading, consider the following statements:
1. It occurs at divergent plate boundaries only
2. It provides supportive explanation for Continental Drift theory
3. It is non consistent at all mid-oceanic ridges.
Which of the above statement(s) is/are correct?



A
Only 1 and 3
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B

Only 2

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C
Only 2 and 3
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D
All of the above
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Solution

The correct option is A Only 1 and 3

Seafloor spreading hypothesis, theory that oceanic crust forms along submarine mountain zones, known collectively as the mid-ocean ridge system, and spreads out laterally away from them.
This idea played a pivotal role in the development of plate tectonics, a theory that revolutionized geologic thought during the last quarter of the 20th century. 
Seafloor spreading occurs at divergent plate boundaries. Seafloor spreading is not consistent at all mid-ocean ridges. Slowly spreading ridges are the sites of tall, narrow underwater cliffs and mountains.
Rapidly spreading ridges have a much more gentle slopes.
Seafloor spreading disproves an early part of the theory of continental drift. Rather, Seafloor
spreading helps explain continental drift in the theory of plate tectonics


Geography

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