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

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Author(s)

  • Gabriella Boretto
  • Giovanni Zanchetta
  • Lorenzo Ciulli
  • Monica Bini
  • Anthony Fallick
  • Marco Lezzerini
  • Andre Carlo Colonese
  • Irene Zembo
  • Luca Trombini
  • Eleonora Rigattieri
  • Giavanni Sarti

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Publication details

JournalCatena
DateAccepted/In press - 1 Jan 2017
DateE-pub ahead of print - 6 Jan 2017
DatePublished (current) - Apr 2017
Volume151
Pages (from-to)225-237
Early online date6/01/17
Original languageEnglish

Abstract

Loess deposits have been described in the past for the upper section of Buca Dei Corvi succession (Central Italy).
In this paper the depositswere 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 transportwas also responsible of deposition of carbonatewhich then dissolved and re-precipitated producing pedogenic concretions. Stable isotopes (13C/12C and 18O/16O ratios) of the concretions are consistent with a climate drier than present conditions, with an environment characterized by sparse vegetation.

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