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Stratigraphic framework of the late Miocene Pisco Formation at Cerro Los Quesos (Ica Desert, Peru)

Author

Listed:
  • C. Di Celma
  • E. Malinverno
  • G. Cantalamessa
  • A. Gioncada
  • G. Bosio
  • I.M. Villa
  • K. Gariboldi
  • A. Rustichelli
  • P.P. Pierantoni
  • W. Landini
  • C. Tinelli
  • A. Collareta
  • G. Bianucci

Abstract

The enormous concentration of marine vertebrates documented within the Pisco Formation is unique for Peru and South America and places this unit among the prime fossil Lagerstätten for Miocene to Pliocene marine mammals worldwide. In order to provide a robust stratigraphic framework for the fossil-bearing locality of Cerro Los Quesos, this study presents a 1:10,000 scale geological map covering an area of about 21 km2, a detailed measured section spanning 290 m of strata, and a refined chronostratigraphy for the studied succession well constrained by diatom biostratigraphy and high-resolution 40Ar/39Ar isotopic dating of three interbedded ash layers. Within the apparently monotonous, diatomite-dominated sedimentary section, the Pisco Formation has been subdivided into six local members, with stratigraphic control over the different outcrops facilitated by the establishment of a detailed marker bed stratigraphy based on 15 readily distinguishable sediment layers of different nature.

Suggested Citation

  • C. Di Celma & E. Malinverno & G. Cantalamessa & A. Gioncada & G. Bosio & I.M. Villa & K. Gariboldi & A. Rustichelli & P.P. Pierantoni & W. Landini & C. Tinelli & A. Collareta & G. Bianucci, 2016. "Stratigraphic framework of the late Miocene Pisco Formation at Cerro Los Quesos (Ica Desert, Peru)," Journal of Maps, Taylor & Francis Journals, vol. 12(5), pages 1020-1028, October.
    • Handle: RePEc:taf:tjomxx:v:12:y:2016:i:5:p:1020-1028
    DOI: 10.1080/17445647.2015.1115783
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