@article{fdi:010086309,
  title = {{H}olocene marine tephra offshore {E}cuador and {S}outhern {C}olombia : first trench-to-arc correlations and implication for magnitude of major eruptions},
  author = {{B}ablon, {M}. and {R}atzov, {G}. and {N}auret, {F}. and {S}amaniego, {P}ablo and {M}ichaud, {F}. and {S}aillard, {M}arianne and {P}roust, {J}. {N}. and {L}e {P}ennec, {J}ean-{L}uc and {C}ollot, {J}ean-{Y}ves and {D}evidal, {J}. {L}. and {O}range, {F}. and {L}iorzou, {C}. and {M}igeon, {S}. and {V}allejo, {S}. and {H}idalgo, {S}. and {M}othes, {P}. and {G}onzalez, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}ephra layers preserved in marine sediments are strong tools to study the frequency, magnitude and source of past major explosive eruptions. {T}hirty-seven volcanoes from the {E}cuadorian and {C}olombian arc, in the northern {A}ndes, experienced at least one eruption during the {H}olocene. {T}he volcanic hazard is therefore particularly high for the populated areas of the {A}ndes and in particular cases for the coastal region, and it is crucial to document such events to improve hazard assessment. {T}he age and distribution of deposits from major {H}olocene eruptions have been studied in the {C}ordillera, but no descriptions of distal fallouts have been published. {I}n this study, we focused on 28 {H}olocene tephra layers recorded in marine sediment cores collected along the northern {E}cuador-{S}outhern {C}olombia margin. {N}ew lithological, geochemical and isotope data together with {C}-14 datings on foraminifers allow us to determine the age and volcanic source of marine tephra, and to propose a first land-sea correlation of distal tephra fallouts. {W}e show that at least seven explosive eruptions from {G}uagua {P}ichincha, {A}tacazo-{N}inahuilca, {C}otopaxi, and {C}erro {M}achin volcanoes left tephra deposits recorded in marine cores over 250 km away from their source. {V}olume estimates of emitted tephra range between 1.3 and 6.0 km(3) for the tenth century {G}uagua {P}ichincha, similar to 5 ka {A}tacazo-{N}inahuilca, similar to 6.7 and similar to 7.9 ka {C}otopaxi events, suggesting that they were eruptions of {V}olcanic {E}xplosivity {I}ndex of 5. {T}he distribution of these deposits also brings new constraints for a better evaluation of the volcanic hazard in {E}cuador.},
  keywords = {tephrochronology ; volcanology ; geochemistry ; land-sea correlation ; {E}cuador ; {EQUATEUR} ; {COLOMBIE} ; {PACIFIQUE} ; {ANDES}},
  booktitle = {},
  journal = {{G}eochemistry {G}eophysics {G}eosystems},
  volume = {23},
  numero = {9},
  pages = {e2022{GC}010466 [38 ]},
  year = {2022},
  DOI = {10.1029/2022gc010466},
  URL = {https://www.documentation.ird.fr/hor/fdi:010086309},
}