@article{fdi:010070250,
  title = {{I}ndependent time markers validate {P}b-210 chronologies for two shallow {A}rgentine lakes in {S}outhern {P}ampas},
  author = {{C}ordoba, {F}. {E}. and {P}iovano, {E}. {L}. and {G}uerra, {L}. and {M}ulsow, {S}. and {S}ylvestre, {F}lorence and {Z}arate, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e report here the results of detailed {P}b-210 analysis from two lake sediment cores collected from {L}agunas {E}ncadenadas del {O}este ({LEO}), located in the southern {A}rgentinean {P}ampas (37 degrees {S}, 62 degrees {W}). {N}on-exponential and non-monotonic {P}b-210, depth-profiles in the sedimentary record of these shallow lacustrine systems indicate the interaction of complex processes behind radionuclide fluxes and lake sedimentation. {T}he chronologies and sediment accumulation rates ({SAR}) for the lake sediment sequences were modeled using different {P}b-210-based mathematical models. {S}ince modeled {P}b-210 ages must be validated against independent stratigraphic markers of known age, two chrono-stratigraphic markers were selected to control the upper and lowermost parts of the {P}b-210 dated sediments. {T}he younger stratigraphic marker of {AD} 1980 +/- 2 corresponds to an uppermost organic carbon-rich mud accumulated by 1977-78 matching the most noticeable lake highstand occurred during the 20th century, registered on instrumental and paleolimnological records across the {P}ampean {P}lains. {T}he oldest stratigraphic marker corresponds to {AD} 1878 +/- 10 matching with a high lake productivity and wet phase related to anomalously intense rainfall and flooding events in southeastern {S}outh {A}merica for {AD} 1877-1878. {W}hen comparing the resulting ages to the stratigraphic markers, our results show that {CRS}-model (constant rate of supply) performs better than the other models. {T}hus, these independent chronostratigraphic markers used along the sedimentary records were critical to validate {P}b-210-derived ages and therefore to select the most appropriate model to establish the chronological framework of the recent sediments of the {LEO} system. {T}he {CRS}-model appears to be an adequate technique for deriving ages and {SAR} in the {LEO} sedimentary record and other {P}ampean lacustrine systems under strong hydrological variability.},
  keywords = {{L}ake sediment chronology ; {P}b-210 radiometric dating ; {S}ediment accumulation rate ; {C}onstant rate of {P}b-210 supply model ; {A}rgentinean ; {P}ampas ; {ARGENTINE}},
  booktitle = {},
  journal = {{Q}uaternary {I}nternational},
  volume = {438},
  numero = {{A}},
  pages = {175--186},
  ISSN = {1040-6182},
  year = {2017},
  DOI = {10.1016/j.quaint.2016.07.003},
  URL = {https://www.documentation.ird.fr/hor/fdi:010070250},
}