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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Geology (GG)
Question..
The sandstone-conglomerate sequence was deposited sometime after 400 Ma (the age of granite clasts in the conglomerate) and before Ma (the age of the ash layer stratigraphically above the sequence). This numerical time range corresponds to the Devonian and Carboniferous periods.
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Mayank vedwal Vedwal Best Answer
The answer should be around 300 My because in question it is written that numerical time range correspond to devonian and Carboniferous periods... so the rock deposited after 400 My which represents the lower boundary of devonian period and 300 My represents the upper time Boundary of Carboniferous period.