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The loess deposits of Buca Dei Corvi section (Central Italy): Revisited

Catena, 2017, Vol.151, p.225(13) [Periódico revisado por pares]

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  • Título:
    The loess deposits of Buca Dei Corvi section (Central Italy): Revisited
  • Assuntos: Carbonates ; Loess
  • É parte de: Catena, 2017, Vol.151, p.225(13)
  • Descrição: To link to full-text access for this article, visit this link: Byline: Gabriella Boretto, Giovanni Zanchetta, Lorenzo Ciulli, Monica Bini, Anthony E. Fallick, Marco Lezzerini, Andre C. Colonese, Irene Zembo, Luca Trombino, Eleonora Regattieri, Giovanni Sarti Abstract: Loess deposits have been described in the past for the upper section of Buca Dei Corvi succession (Central Italy). In this paper the deposits were re-analysed to clarify the depositional environment and to attempt a paleoclimate reconstruction. Two radiocarbon dates on pedogenic carbonate constrain the ages to the Late Glacial, and are consistent with previous OSL dating of the top of the succession. The non-marine mollusc assemblage shows typical character of cold and dry climatic conditions, testified by strong oligotypical composition. Mineralogy and geochemistry of the sediments indicate the abundant presence of exotic quartz mineral which can be explained only by wind transport. Probably, wind transport was also responsible of deposition of carbonate which then dissolved and re-precipitated producing pedogenic concretions. Stable isotopes (.sup.13C/.sup.12C and.sup.18O/.sup.16O ratios) of the concretions are consistent with a climate drier than present conditions, with an environment characterized by sparse vegetation. Article History: Received 14 April 2016; Revised 30 December 2016; Accepted 1 January 2017
  • Idioma: Inglês

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