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Transición Cretácico/Terciario en depósitos continentales de la cuenca de Tremp-Graus: datos preliminares de isótopos estables de CyO

López Martínez, Nieves and Arribas Mocoroa, María Eugenia and Civis Llovera, Jorge and González Delgado, José Ángel (1996) Transición Cretácico/Terciario en depósitos continentales de la cuenca de Tremp-Graus: datos preliminares de isótopos estables de CyO. Geogaceta (20(1)). pp. 62-65. ISSN 0213-683X

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Abstract

Continental deposits around the CretaceouslTertiary boundary have been studied for stratigraphy,
sedimentology, paleontology and stable isotopes (JJC and 180) in the Benabarre and Fontlfonga sections
(Tremp and Ager synclines, Southern Pyrenees). Similarities in lithology, sedimentary evolution, fossil
content and isotopic values allow us to interpret these deposits as part of a single basin. A shift in the
isotopic content (rise in 180 and fall in 13C) around the KIT boundary is detected. The in creas e in 180 may
be Iinked to higher temperatures andlor to evaporation. The 13e falf matches the «z event» described in
marine environments and interpreted as due to a decrease in marine organic productivity. In nonmarine environments however it could indicate an increase in plant production.


Item Type:Article
Uncontrolled Keywords:Stratigraphy, Sedimentology, Paleontology, Stable isotopes, KIT boundary, NE Spain
Subjects:Sciences > Geology > Stratigraphic geology
ID Code:10007
Deposited On:04 Feb 2010 09:10
Last Modified:04 Feb 2010 09:49

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