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Analysis of the D/H ratio of pedogenic clay and the 18 O/ 16 O ratio of carbonate nodules collected from Siwalik sediments in India indicates three episodes of monsoon intensification at ~11Ma, 6Ma and 3Ma. These episodes coincide with major pulses of tectonic uplift in the Himalayas suggesting causal link between monsoon intensity and uplift. In addition, variation in the carbon isotope...
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