RT Journal Article
T1 Señales geoquímicas y micropaleontológicas como marcadores de eventos paleoceanográficos en el Santoniense del Arco Vasco
T1 Geochemical and micropalaeontologic signals as palaeoceanographic event markers from the Santonian of the Basque Arc
A1 Jiménez Berrocoso, A.
A1 Pascual, Ana
A1 Elorza, Javier
AB Comparative study of micropalaeontologic (planktonic and benthic foraminifers) and isotopic (8,80 and 5'3C values from inoceramids and whole rock) data from the Santonian of the Barrika section (Basque Arc, northern Spain) shows the existence of four events, each one with different biotic and geochemical signals. Diagenetic alteration of isotopic profiles (5,eO and 8I3C) have not been so severe to delete completely the geochemical signals from inoceramids and whole rock. As a consequence, events 1st, 2nd and 3rd show a 5lsO positive excursion (cooling) and sea level falls; however the 4th event marks a global regression at 85 m.y., that could have caused strong local alteration of the planktonic and benthic foraminifer assemblages. In this case, the eustatic fall shows a S'0O negative excursion, that could be related to meteoric cementation, due to sea level lowstand
PB Sociedad Geológica de España
YR 2001
FD 2001
LK http://hdl.handle.net/10272/9727
UL http://hdl.handle.net/10272/9727
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026