SSC
PHYSICAL GEOGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The Great Rift Valley was formed mainly by
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Shifting tectonic plates
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Seawater erosion
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Nile River flooding
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Large meteor
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Explanation:
Detailed explanation-1: -As tectonic plates move away from one another at mid-ocean ridges, molten rock from the mantle may well up and harden as it contacts the frigid sea, forming new oceanic crust at the bottom of the rift valley.
Detailed explanation-2: -On one side of the rift lies the Nubian (or African) tectonic plate, which includes the older continental crust of Africa. The Somalian plate-which is moving away in the other direction-lies to the other side and includes the Horn of Africa.
Detailed explanation-3: -The Great Rift Valley was formed about 40 million years ago when tectonic plates split and gave rise to the East African Rift. This geographical trough stretches about 6000 kilometers (or 3700 miles) in length.
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