Publication Date:
2022-05-04
Description:
The Global Stratotype Section and Point (GSSP) for the base of the
Bartonian (middle Eocene) stage is as yet undefined. Here, we assess the GSSP
potential of the La Acebosa Formation exposed on the eastern side of the Cape of
Oyambre (San Vicente de la Barquera, province of Cantabria, northern Spain).
Sedimentological and benthic foraminiferal data indicate that the La Acebosa
Formation represents a bathyal environment related to a deepening, eastwardfacing
slope. Preliminary planktic foraminiferal and calcareous nannofossil results
show that the upper part of the section corresponds to zones E11 and CP14a,
respectively, and thus could include the Lutetian–Bartonian boundary. Although
the quality of demagnetization is quite poor, preliminary magnetostratigraphic data
suggest that Chron C19n, which is most likely to define the Bartonian GSSP, could
be recorded in the upper part of the La Acebosa Formation. A denser magnetostratigraphic
and biostratigraphic sampling is required in the upper part of this unit
in order to accurately identify Chron C19n and to establish the sequence of events
across the Lutetian–Bartonian transition.
Description:
Published
Description:
Lisbona
Description:
1A. Geomagnetismo e Paleomagnetismo
Description:
restricted
Keywords:
Eocene
;
Bartonian
;
GSSP
;
Pyrenees
;
Cantabria
;
Oyambre
;
03. Hydrosphere::03.01. General::03.01.06. Paleoceanography and paleoclimatology
;
04. Solid Earth::04.04. Geology::04.04.08. Sediments: dating, processes, transport
;
04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
Extended abstract
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