Figure DR6. Weathering history and landscape evolution of Western Ghats (India) from <sup>40</sup>Ar/<sup>39</sup> Ar dating of supergene K–Mn oxides JeanA. BeauvaisA. ChardonD. ArnaudN. JayanandaM. MatheP.E. 2019 <sup>40</sup>Ar/<sup>39</sup> Ar age spectra and isochrones of cryptomelane grains collected in samples of Illva Mn ore deposit.