The Global Boundary Stratotype Section and Point (GSSP) of the Toarcian-Aalenian boundary (Lower-Middle Jurassic)

Authors
Cresta, S Goy, A Ureta, S Arias, C Barron, E Bernad, J Canales, ML Garcia-Joral, F Garcia-Romer, E Gialanella, PR Gomez, JJ Gonzalez, JA Herrero, C Martinez, G Osete, ML Perilli, N Villalain, JJ
Citation
S. Cresta et al., The Global Boundary Stratotype Section and Point (GSSP) of the Toarcian-Aalenian boundary (Lower-Middle Jurassic), EPISODES, 24(3), 2001, pp. 166-175
Citations number
49
Categorie Soggetti
Earth Sciences
Journal title
EPISODES
ISSN journal
07053797 → ACNP
Volume
24
Issue
3
Year of publication
2001
Pages
166 - 175
Database
ISI
SICI code
0705-3797(200109)24:3<166:TGBSSA>2.0.ZU;2-C
Abstract
The Global Boundary Stratotype Section and Point (GSSP) for the Aalenian St age, formally defined at the base of bed FZ107 in the Fuentelsaz section, C astilian Branch of the Iberian Range (Spain), has been ratified by the IUGS . Multidisciplinary biostratigraphical data, based on ammonites, brachiopod s, ostracods, bivalves, foraminifera, calcareous nannofossils assemblages a nd palynomorphs, assure worldwide correlations; magnetostratigraphic data i ncrease this correlation power The position of the boundary coincides with the first occurrence of the ammonite assemblage characterized by Leioceras opalinum and Leioceras lineatum and corresponds with a normal polarity inte rval correlated with the up-to-date Jurassic magnetic polarity time scale ( Gradstein and others, 1994; Ogg, 1995).