@article{fdi:010065718,
  title = {{V}ery long-term stability of passive margin escarpment constrained by 40{A}r/39{A}r dating of {K}-{M}n oxides},
  author = {{B}eauvais, {A}nicet and {B}onnet, {N}.{J}. and {C}hardon, {D}ominique and {A}rnaud, {N}. and {J}ayananda, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he post-rift denudation history of high-elevation divergent continental margins is central to deciphering source-to-sink systems across such margins and to unraveling their topographic evolution. {W}e performed 40{A}r-39{A}r dating of supergene {K}-{M}n oxides from supergene manganese ore deposits in order to constrain the age of in situ formed laterites on both the lowland and highland sides of the {W}estern {G}hats {E}scarpment of {P}eninsular {I}ndia. {D}ocumentation of laterites as old as 53 {M}a on the highland and 47 {M}a at the foot of the escarpment shows that the escarpment stabilized before 47 {M}a (possibly 60 {M}a). {T}he topographic setting of the dated weathering mantles also constrains denudation of the lowland and the highland since ca. 50 {M}a to maximums of 5 m/m.y. and 15 m/m.y., respectively. {O}ur results challenge denudation rates derived from apatite fission track thermochronology by documenting the topography and relief longevity of the southwest {I}ndian margin and its hinterland. {T}he results preclude large-magnitude uplift of {P}eninsular {I}ndia after the {E}ocene, and more generally argue against late {N}eogene uplift and topographic rejuvenation of continental shields.},
  keywords = {{INDE}},
  booktitle = {},
  journal = {{G}eology},
  volume = {44},
  numero = {4},
  pages = {299--302},
  ISSN = {0091-7613},
  year = {2016},
  DOI = {10.1130/{G}37303.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010065718},
}