Sea-level changes during the last 41,000 years in the outer shelf of the southernTyrrhenian Sea: Evidence from benthic foraminifera and seismostratigraphicanalysis

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Abstract

An integrated high resolution study based both on a seismostratigraphic approach and on a sedimentarycore (VIB 10), collected in the outer shelf (127 m depth) from the southern Tyrrhenian Sea (Gulf ofTermini, Sicily), provides new data about climatic, eustatic and paleoenvironmental changes during thelast w41,000 years. The results based on the interpretation of a seismic profile, on benthic foraminiferaassemblages and on d18O records, allowed recognition of two drastic sea-level falls during the Last GlacialMaximum (LGM) and the Younger Dryas (YD). The short deglacial event, between LGM and YD, known asBølling/Allerød, played an important role in the sea-level rise that produced changes in benthic foraminiferalassemblages, favoring the proliferation of shallow water species of the inner shelf. After theYounger Dryas, warmer climatic conditions were rapidly established (Climatic Optimum) as indicated bythe decrease of d18O values. The rapid sea-level rise due to the input of fresh water from ice caps meltingfollowing the increase of Earth’s mean temperature is also indicated by the aggradational geometries ofsedimentary layers observed in the seismic profile and by the increase of benthic foraminiferal speciestypical of the outer shelf.
Lingua originaleEnglish
pagine (da-a)122-131
Numero di pagine10
RivistaQuaternary International
Volume232
Stato di pubblicazionePublished - 2011

All Science Journal Classification (ASJC) codes

  • Earth-Surface Processes

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