Publication Date:
2017-04-04
Description:
It has long been known that a major larger foraminifera turnover (LFT) occurred at the boundary between the
Thanetian and Ilerdian stages, but its possible correlation with the Paleocene-Eocene thermal maximum
(PETM) was unsuspected until the work of Baceta (1996), and has been controversial ever since. After summarizing
the history of this controversy, we present information from three new sections that conclusively resolve
the issue, all of them placed less than 2 km to the east of the classical Campo section in the southern Pyrenees.
In these three sections, an up to 7 meter-thick intercalation of continental deposits rich in pedogenic carbonate
nodules is sandwiched between uppermost Thanetian and lowermost Ilerdian shallow marine carbonates. The
δ13C composition of 42 pedogenic nodules collected from two of these sections (San Martín and La Cinglera)
ranges between –11.4 and -14.3‰ and averages –12.9‰, values that conclusively represent the PETM and for
the first time are recorded in sections where the LFT is clearly represented. Further, a high-resolution lithological
correlation between Campo and the three new sections across the P-E interval unquestionably demonstrates
that the lowermost marine beds with autochthonous specimens of Alveolina vredenburgi (a tell-tale of the LFT)
are laterally interfingered –and are therefore coeval- with the nodule-bearing PETM continental deposits. On
the basis of the new evidence, the temporal coincidence of the PETM and the LFT can no longer be doubted.
Description:
Published
Description:
161-175
Description:
2.2. Laboratorio di paleomagnetismo
Description:
JCR Journal
Description:
reserved
Keywords:
PETM
;
Paleocene-Eocene boundary
;
Larger foraminifera
;
Isotopes
;
Campo section
;
03. Hydrosphere::03.01. General::03.01.06. Paleoceanography and paleoclimatology
;
04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy
;
04. Solid Earth::04.05. Geomagnetism::04.05.06. Paleomagnetism
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Permalink
