Formal ratification of the GSSP for the base of the Calabrian stage (second stage of the Pleistocene series, Quaternary system)

Author(s): Cita, Maria Bianca; Gibbard, Philip L.; Head, Martin J.
Author Affiliation(s): Primary:
Universita di Milano, Dipartimento di Scienze della Terra "Ardito Desio", Milan, Italy
University of Cambridge, United Kingdom
Brock University, Canada
Volume Title: Episodes
Source: Episodes, 35(3), p.388-397. Publisher: International Union of Geological Sciences (IUGS), Ottawa, ON, Canada. ISSN: 0705-3797 CODEN: GENWBO
Note: In English. 44 refs.; illus., incl. sketch maps
Summary: The Calabrian Stage is now formally defined by the Global Boundary Stratotype Section and Point (GSSP) at Vrica, Calabria, Italy. This GSSP has previously defined the base of the Pleistocene Series. The Calabrian becomes the second stage of the Pleistocene Series and Quaternary System, following the Gelasian. the GSSP occurs at the base of the marine claystone conformably overlying sapropelic bed 'e' within Segment B in the Vrica section. This lithological level represents the primary marker for the recognition of the boundary, and is assigned an astronomical age of 1.80 Ma on the basis of sapropel calibration. It coincides with the transition from Marine Isotope Stage 65 to 64, and the underlying sapropel bed 'e' is assigned to the Mediterranean Precession-Related Sapropel layer 176. Secondary markers include calcareous plankton bioevents of widely distributed taxa. The boundary falls between the highest occurrence of Discoaster brouweri (below) and the lowest common occurrence of left-coiling Neogloboquardrina pachyderma (above), and below the lowest occurrences of medium-sized Gephyrocapsa (including G oceanica) and globigerinoids tenellus. The tope of the Olduvai Subchron is identified c. 8 m above the GSSP. Ratification of the Calabrian Stage effectively completes the Lower Pleistocene Subseries.
Year of Publication: 2012
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Calabria Italy; Calabrian; Cenozoic; Chronostratigraphy; Crotone Italy; East Mediterranean; Europe; Italy; Leg 160; Leg 161; Lower Pleistocene; Mediterranean Sea; Minorca Rise; ODP Site 967; ODP Site 975; Ocean Drilling Program; Pleistocene; Quaternary; Sicily Italy; Southern Europe; Stratigraphic boundary; Stratigraphic units; Stratotypes; Vrica Italy; West Mediterranean
Coordinates: N340411 N340411 E0324331 E0324331
N385348 N385348 E0043036 E0043036
N390500 N390500 E0170700 E0170700
Record ID: 2013036181
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