Continental drift theory is currently the most accepted theory to explain the shape of earth rsquo s...........

Geography Geomorphology

Continental drift theory is currently the most accepted theory to explain the shape of earth’s surface and formation of landforms. Which of the following statements according to Plate Tectonic theory are correct?

1. The lithosphere is broken in fragments called plates and they are moving with respect to each other over Aesthenosphere.

2. The forces responsible for movement of plates are gravitational pull of the moon and earth’s rotation.

Select the code from following:

1 only

2 only

Both

None

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Explanation:

Plate Tectonic Theory:
The term plate tectonics was first used by Tuzo Wilson of the University of Toronto but the theory of plate tectonics was first published by W. J. Morgan of the Princeton University in 1962. This theory is based on the concept of ‘sea- floor spreading’ advocated by Hess. It is an improvement over the Wegener’s continental drift theory and has been considered as the most sophisticated and comprehensive theory about the drift of continents and expansion of sea floors.
According to this theory the lithosphere is believed to have been broken into fragments which are in constant movement with respect to each other. The movement of these plates is attributed to the convention currents being generated in upper mantle. The margins of the plates are the sites of considerable geologic activity such as sea floor spreading, volcanic eruptions, crustal deformation, mountain building and continental drift.