@article{fdi:010078583,
  title = {{W}eathering history and landscape evolution of  {W}estern {G}hats ({I}ndia) from 40{A}r/39{A}r dating of supergene {K}-{M}n oxides},
  author = {{J}ean, {A}. and {B}eauvais, {A}nicet and {C}hardon, {D}ominique and {A}rnaud, {N}.  and {J}ayananda, {M}. and {M}athe, {P}.{E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{L}aterites preserved on both sides of the {W}estern {G}hats {E}scarpment of {P}eninsular {I}ndia have formed by long-term lateritic weathering essentially after {I}ndia-{S}eychelles continental break-up following {D}eccan {T}raps emplacement (c.63 myrago). {S}upergene manganese ores of the {W}estern {G}hats were formed on {L}ate {A}rchean manganese protores. {A}mong {M}n oxides composing the ores, cryptomelane ({K}-rich {M}n oxide) was characterized and dated by 40{A}r/39{A}r geochronology. {M}easured ages complement those previously obtained in other {S}outh {I}ndian manganese ores from the hinterland plateau and further documentthree major weathering periods,c.53-44,c.39-22 andc.14-10 {M}a, the last being documented for the first time in {I}ndia. {T}hese periods coincide with global palaeoclimatic proxies and date the lateritic weathering of three successive palaeolandscapes of the {W}estern {G}hats that evolved under slow denudation (c.8m{M}a-1) over the last 44 myr and were mostly incised during the {N}eogene (<22 {M}a). {T}his indicates that the {W}estern {G}hats are a relict of a {S}outh {I}ndian plateau preserved at the headwaters ofvery long east-flowing river systems and above the {W}estern {G}hats {E}scarpment. {T}opography and denudation history of thislandscape do not require {N}eogene tilt of the {P}eninsula as recently proposed.},
  keywords = {{INDE} ; {KARNATAKA}},
  booktitle = {},
  journal = {{J}ournal of the {G}eological {S}ociety},
  volume = {177},
  numero = {3},
  pages = {523--536},
  year = {2020},
  DOI = {10.1144/jgs2019-048},
  URL = {https://www.documentation.ird.fr/hor/fdi:010078583},
}