10.6084/m9.figshare.10259984.v1 A. Jean A. Jean A. Beauvais A. Beauvais D. Chardon D. Chardon N. Arnaud N. Arnaud M. Jayananda M. Jayananda P.E. Mathe P.E. Mathe Table DR5. Weathering history and landscape evolution of Western Ghats (India) from <sup>40</sup>Ar/<sup>39</sup> Ar dating of supergene K–Mn oxides Geological Society of London 2019 Table DR 5. Weathering history 40 Ar 39 Ar spectrometer Argus VI.The concentrations Geology 2019-11-06 12:39:29 Dataset https://geolsoc.figshare.com/articles/dataset/Table_DR5_Weathering_history_and_landscape_evolution_of_Western_Ghats_India_from_sup_40_sup_Ar_sup_39_sup_Ar_dating_of_supergene_K_Mn_oxides/10259984 Analytical results obtained for each irradiated and dated cryptomelane grains analysed using laser energy (in power %) of the spectrometer Argus VI.The concentrations (in molar volume, V) of <sup>36</sup>Ar, <sup>37</sup>Ar, <sup>38</sup>Ar, <sup>39</sup>Ar and <sup>40</sup>Ar with their respective 1σ error are provided for each step heating. The amount of <sup>40</sup>Ar* (%), of <sup>39</sup>Ar released (% <sup>39</sup>Ar) and the K/Ca ratio (derived from <sup>39</sup>Ar/<sup>37</sup>Ar) are also given, and also the sample parameters and the irradiation constants. Finally, this table show ratios <sup>40</sup>Ar*/<sup>39</sup>Ark used to determine the corresponding apparent ages with their associated 2σerror. The different J-Factor values are also provided for each irradiated grains.