@article{fdi:010015042,
  title = {{C}oseismic coastal uplift and coralline algae record in {N}orthern {C}hile : the 1995 {A}ntofagasta earthquake case},
  author = {{O}rtlieb, {L}uc and {B}arrientos, {S}. and {G}uzman, {N}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}oralline algae that may be predominant in the upper part of the infralittoral zone along rocky shorelines proved to be a useful indicator of rapid coastal uplift. {A}s these encrusting algae cannot survive desiccation, even for short periods at low tide, they can provide estimates of positive vertical motions like those which may accompany seismic events. {T}he desiccation of a fringe of the algal encrustment, at the base of the intertidal area (= infralittoral fringe), combined with effects of solar radiation rapidly kills the organisms. {T}his mortality results in a conspicuous alteration of the pigmentation from pink/beige/reddish to white. {A}fter the {J}uly 30, 1995 {A}ntofagasta earthquake ({M}w 8.1), in northern {C}hile, such a white fringe appeared in some parts of the bay of {A}ntofagasta and surroundings. {T}he width of the dead algae fringe varied from 0 to more than 1.8 m. {T}he widest observed widths are related to local parametres (exposition to wave splash, geometric disposition) that account for an amplification of the width of the dead algae fringe, and must be identified. {T}hus, a careful study of each locality led us to determine the extent of the coastal areas that had been uplifted, and to reconstruct, with a precision of the order of 2 cm, the amount of the vertical deformation along the {A}ntofagasta {B}ay and southern {M}ejillones {P}eninsula. {I}t was thus shown that the coastline bordering the town of {A}ntofagasta suffered practically non coseismic uplift, while areas to the south and to the west of {A}ntofagasta {B}ay proved to have been uplifted by as much as 25 and 40 cm, respectively. {T}he maximum uplift (80 cm) was seen at the southwestern tip of the peninsula of {M}ejillones. {T}hese precise reconstructions are of great help for the calibration of geodetic studies performed independently and for the modelling of the coseismic deformation at a regional scale. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{GEODYNAMIQUE} ; {ZONE} {COTIERE} ; {DEPLACEMENT} ; {ALGUE} {CALCAIRE} ; {SEISME} ; {NEOTECTONIQUE} ; {CHILI} ; {ANTOFAGASTA} {REGION}},
  booktitle = {{R}ecords of rapid events in late quaternary shorelines},
  journal = {{Q}uaternary {S}cience {R}eviews},
  volume = {15},
  numero = {8-9},
  pages = {949--960},
  ISSN = {0277-3791},
  year = {1996},
  DOI = {10.1016/{S}0277-3791(96)00056-{X}},
  URL = {https://www.documentation.ird.fr/hor/fdi:010015042},
}