Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3004
AuthorsPayros, A.* 
Bernaola, G.* 
Orue-Etxebarria, X.* 
Dinarès-Turell, J.* 
Tosquella, J.* 
Apellaniz, E.* 
TitleReassessment of the Early-Middle Eocene boundary: biomagnetocronology from the Gorrondatxe section (Basque country, Western Pyrenees).
Issue Date2007
Series/Report no./ 40 (2007)
DOI10.1111/j.1502-3931.2007.00016.x.
URIhttp://hdl.handle.net/2122/3004
KeywordsCalcareous nannofossil
magnetostratigraphy
Subject Classification04. Solid Earth::04.04. Geology::04.04.10. Stratigraphy 
AbstractThirteen Lower–Middle Eocene (Ypresian–Lutetian) successions, including the Gorrondatxe section in the western Pyrenees, show biomagnetostratigraphic correlation schemes that do not agree with the current standard framework. The main discrepancy concerns the position of the boundary between planktonic foraminiferal Zones P9 (=E7, approximately) and P10 (=E8, approximately), which was thought to occur within calcareous nannofossil Subzone CP12a and at the boundary between magnetic polarity Chrons C22n and C21r. However, in the differing correlation scheme the boundary between Zones P9 (=E7) and P10 (=E8) occurs close to the base of Subzone CP13a and to the boundary between Chrons C21n and C20r. An attempt at a new Ypresian–Lutetian boundary biomagnetochronology is made based on data from the Gorrondatxe section, which shows that the boundary between Zones P9 (=E7) and P10 (=E8) is 3.1 Myr younger than hitherto considered. Therefore, the duration of the Early Eocene, most commonly defined according to this planktonic foraminiferal zonal boundary, has generally been underestimated over the last four decades.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Payros_07_YL_Gorrondatxe.pdf1.05 MBAdobe PDFView/Open
Show full item record

Page view(s)

66
Last Week
0
Last month
checked on Jun 23, 2017

Download(s)

20
checked on Jun 23, 2017

Google ScholarTM

Check

Altmetric