History · Negotiating the Sources
UGC NET June 2024 History (Cancelled)
The oldest rocks on the earth's surface, as revealed by radioactivity, belong to which of the following?
AThe Proterozoic Age
BThe Pleistocene Age
CThe Archean Age ✓ Correct
DThe Neolithic Age
Correct answer: (C) The Archean Age — The answer is the Archaean Age, to which the oldest rocks belong.
Explanation
★The answer is the Archaean Age, to which the oldest rocks belong.
★The geological history of India begins with the rocks of the Archaean group.
★The word Archaean means most ancient or related to the earth's oldest geological time.
★These rocks lie below the oldest Eparchaean unconformity and form the base of later rocks.
★Gneiss is a common Archaean rock, along with granite, marble, quartzite and pegmatite.
★The Pleistocene and Neolithic are far later phases, so they are wrong.
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