Sea Level Changes During the Last and Present Interglacials in Sal Island (Cape Verde Archipelago)
Sea level changes during the last and present interglacials in Sal Island (Cape Verde archipelago) a * b d b a e C. Zazo , , J.L. Goy , C. Hillaire-Marcel c, Cl. Dabrio , JA Gonzalez-Delgado , A. Cabero , T. Bardaji , f B. Ghaleb c, V. Soler • Departamento de Geo/agm, Museo Nacianal de Ciencias Naturales, CSIC,jose Gutierrez Abascal, 2, 28006-Madrid, Spain b Departamento de Ge%gia, Farultad de Ciencias, Universidad de Salamanca, 370GB-Salamanca, Spain C GEOTOP-UQAM, Montreal, Canada H3C 3P8 d Departamento de Estmugrafta, Facultad de Ciencias Ge%gicas &' Instituto de Geologia Economica CSIC, Universidad Complutense, 28040-Madrid, Spain • Departamento de Ge% gia, Facultad de Ciencias, Universidad de AlcaUi, 28871-Alca/{j de Henares, Spain r Estacion Volcanol6gica de Canarias, CSIC, Avenida Astrofisico Sdnchez 3, 38206 La Laguna-Tenerife, Spain ABSTRACT Last intergiacial and Holocene deposits are particularly well developed in the southern parts of Sal Island (Cape Verde Archipelago). They primarily consist of low-elevation (::::;;2m above sea level [a.s.l.]) marine deposits made of a basal conglomerate embedded in carbonate mud, passing upwards to ca1carenites. All deposits contain an abundant fauna with corals, algae and molluscs with Strombus latus Gmelin and accompanying warm water species of the "Senegalese" fauna. Small scale geomorphological mapping with detailed Eastern Atlantic morphosedimentary analysis revealed lateral facies changes and imbricate (offlapping) structures that suggest last interglacial small-scale oscillations of paleo-sealevels during high sea stand intervals. U-series measurements (in coral Holocene 5.5 marine terrace fragments) allowed unequivocal identification of Marine Isotope Substage (MIS) units, but were not barrier island precise enough to date the sea level oscillations of the interval.
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