@article{fdi:010037752,
  title = {{P}lanation, bauxites and epeirogeny : one or two paleosurfaces on the {W}est {A}frican margin?},
  author = {{C}hardon, {D}ominique and {C}hevillotte, {V}iolaine and {B}eauvais, {A}nicet and {G}randin, {G}eorges and {B}oulang{\'e}, {B}runo},
  editor = {},
  language = {{ENG}},
  abstract = {{M}apping of lateritic bauxites over the {W}est {A}frican rifted margin and analysis of the geomorphic properties of these bauxites, combined with available geological data lead to a discussion of the presence of either two {M}eso-{C}enozoic planation surfaces or a single {E}ocene surface to account for the morphotectonic and paleoclimatic evolution of the {G}uinean landforms. {A}t large scale, two stepped bauxitic levels are documented. {O}ngoing or episodic uplift following {G}ondwana breakup and {M}eso-{C}enozoic climate change are proposed to have allowed the formation and abandonment of an {E}arly mid-{C}retaceous surface today preserved as the higher bauxitic level, and the setting of an {E}ocene planation surface bearing a second generation of bauxites, making the lower bauxitic level. {T}he single {E}ocene surface hypothesis requires that {P}aleogene bauxitization preserved large pre-existing relief to explain two stepped bauxitic levels of the same age. {T}he two-surface hypothesis is favored because it would explain rebauxitization of alluvial pebbles of bauxites under the lower lateritic level.},
  keywords = {laterite ; bauxite ; planation surface ; epeirogeny ; passive margin ; {A}frica ; {AFRIQUE} {DE} {L}'{OUEST}},
  booktitle = {},
  journal = {{G}eomorphology},
  volume = {82},
  numero = {3-4},
  pages = {273--282},
  ISSN = {0169-555{X}},
  year = {2006},
  DOI = {10.1016/j.geomorph.2006.05.008},
  URL = {https://www.documentation.ird.fr/hor/fdi:010037752},
}