The 'Nevasan Industry' coined by H.D. Sankalia is highly critical in Indian prehistory because it represents a qualitative raw material break during the Middle Paleolithic phase due to which of the following?

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H.D. Sankalia defined the Middle Paleolithic assemblage based on excavations at Nevasa (Pravara River, Maharashtra). This phase shows a distinct technological shift where hominids abandoned heavy quartzite in favor of smaller, sharper flakes detached from cryptocrystalline silica compounds like chert, jasper, agate, and chalcedony.

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