Figure DR2. Weathering history and landscape evolution of Western Ghats (India) from 40Ar/39 Ar dating of supergene K–Mn oxides

Field characteristics and petrographic structures of samples collected in Mn ore deposits from the western and central morphogeological strips. (a) Terali Mn ore deposit with (b) sample TER-1 showing a massive Mn ore in iron duricrust; (c) Nagari Mn ore deposit with collected samples whose (d) NAG-1 shows a massive Mn ore.