Late Cretaceous sea-level changes in Tunisia: a multi-disciplinary approach

Détails

ID Serval
serval:BIB_C3912B4C07E0
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Late Cretaceous sea-level changes in Tunisia: a multi-disciplinary approach
Périodique
Journal of the Geological Society
Auteur(s)
Li L.Q., Keller G., Adatte T., Stinnesbeck W.
ISSN-L
0016-7649
Statut éditorial
Publié
Date de publication
2000
Peer-reviewed
Oui
Volume
157
Pages
447-458
Langue
anglais
Résumé
A multi-disciplinary study of sea-level and climate proxies, including
bulk rock and clay mineral compositions, carbon isotopes, total organic
carbon (TOC), Sr/Ca ratios, and macro- and microfaunal associations,
reveals seven major sea-level regressions in the southwestern Tethys
during the last 10 million years of the Cretaceous: late Campanian (c.
74.2 Ma, 73.4-72.5 Ma and 72.2-71.7 Ma), early Maastrichtian (70.7-70.3
Ma, 69.6-69.3 Ma, and 68.9-68.3 Ma), and late Maastrichtian (65.45-65.3
Ma). Low sea levels are generally associated with increased terrigenous
influx, low kaolinite/chlorite+mica ratios, high TOC and high Sr/Ca
ratios, whereas high sea levels are generally associated with the
reverse conditions. These sea-li:vel changes may be interpreted as
eustatic as suggested by the global recognition of at least four of the
seven major regressions identified (74.2 Ma, 70.7-70.3 Ma, 68.9-68.3 Ma
and 65.45-65.3 Ma). Climatic changes inferred from clay mineral contents
correlate with sea-level changes: warm or humid climates accompany high
sea levels and cooler or arid climates generally accompany low sea
levels.
Création de la notice
28/09/2012 11:02
Dernière modification de la notice
03/03/2018 21:12
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