1ST DIRECT RADIOMETRIC DATING OF THE TORTONIAN MESSINIAN BOUNDARY

Authors
VAI GB VILLA IM COLALONGO ML
Citation
Gb. Vai et al., 1ST DIRECT RADIOMETRIC DATING OF THE TORTONIAN MESSINIAN BOUNDARY, Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre, 316(10), 1993, pp. 1407-1414
Citations number
29
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie 2, Mecanique, physique, chimie, sciences de l'univers, sciences de la terre → ACNP
ISSN journal
07644450
Volume
316
Issue
10
Year of publication
1993
Pages
1407 - 1414
Database
ISI
SICI code
0764-4450(1993)316:10<1407:1DRDOT>2.0.ZU;2-P
Abstract
New volcanogenic layers found in the Northern Apennines of Romagna at the Tortonian/Messinian transition have been dated. The Globorotalia s uterae FAD yielded a date of 7.72+/-0.15 Ma (1 sigma) (K/Ar on biotite s). The boundary taken as the Globorotalia conomiozea FAD is closely p redated by 7.33 Ma (K/Ar on biotite and Ar-39/Ar-40 on plagioclase). A n age of 7.26+/-0.10 Ma for the boundary is suggested. There are appro priate conditions for placing here the related Global Stratotype Secti on and Point.