@article{fdi:010042762,
  title = {{S}uccessive reef depositional events along the {M}arquesas foreslopes ({F}rench {P}olynesia) since 26 ka},
  author = {{C}abioch, {G}uy and {M}ontaggioni, {L}. and {F}rank, {N}. and {S}eard, {C}. and {S}alle, {E}. and {P}ayri, {C}laude and {P}elletier, {B}ernard and {P}aterne, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{B}athymetric surveys of submarine platforms and terraces of the tropical {M}arquesas archipelago ({F}rench {P}olynesia), coupled with sedimentological and paleoecological analyses and radiometric dating of dredged rocks, reveal the occurrence of several distinct intervals of reef deposition during the last deglacial sea-level rise (i.e. the last 26,000 yr or 26 ky). {F}ive facies related to reef, shallow-water and deeper depositional zones have been identified, on the basis of their respective biological assemblages. {F}acies 1, 2 and 3 consist of in situ scleractinian corals (mainly {P}orites) associated with thick crusts of coralline algae species, {H}ydrolithon onkodes, {H}. reinboldii, {L}ithophyllum pustulatum group, and widespread vermetids and victoriellinid foraminifers. {T}hese assemblages are typical of high-energy, shallow-water reef settings (i.e. upper forereef, reef crest and outer reef flat, and inner reef flat respectively). {F}acies 4 is characterized by the prevalence of {H}alimeda plates, mixed with debris of {A}mphiroa and {A}mphistegina spp.; these algae generally inhabit the inner parts of the reef flat and backreef zones but also the relatively protected, deeper parts of outer reef slopes. {F}acies 5 is composed of large broken mollusc shells (oysters), embedded in fine-grained sediments with significant numbers of deep-living coralline algae {M}esophyllum sp., and planktonic foraminifers. {L}ocally, mollusc shells are covered with microbialite crusts. {T}he replacement of shallower assemblages by deeper ones is interpreted as an upward-deepening sequence. {I}dentification of morphological and biological features combined with coral dating provide evidence of 4 reef generations ({RG}) between 26 and 9 ka, now ranging from 138 to 58 m in depth: 1) {RG} 0 from 26 to 19 ka in the 125-115 m depth interval; 2) {RG} 1 from 18 to 15 ka between 110 and 95 m: 3) {RG} 2 from 14 to 11.5 ka between 80 and 68 m; and 4) {RG} 3 younger than 11.5 ka, at around 55 to 60 m. {T}he first three units exhibit clear zonation, from upper reef slope to reef flat. {T}heir development was probably interrupted by abrupt rises in sea-level and/or drastic climate changes. {S}uch a scenario is similar to observations reported in {B}arbados and {H}awai'i where rapid rises in sea-level, interpreted as reflecting major melting events of continental ice, caused the drowning of reefs. {T}he younger unit refers to coral banks similar to those in modern {M}arquesas environments. {T}he replacement of typical coral reefs by coral banks may reflect an increase {E}l {N}ino-{S}outhern {O}scillation ({ENSO}) frequency and intensity inimical to reef development in the last 12 ka.},
  keywords = {{M}arquesas archipelago ; {D}rowned reefs ; {B}iological assemblages ; {S}ea-level changes ; {D}eglacial sea-level rise},
  booktitle = {},
  journal = {{M}arine {G}eology},
  volume = {254},
  numero = {1-2},
  pages = {18--34},
  ISSN = {0025-3227},
  year = {2008},
  DOI = {10.1016/j.margeo.2008.04.014},
  URL = {https://www.documentation.ird.fr/hor/fdi:010042762},
}