Lyell Collection
Journal of the Geological Society
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by SMART, C. W.
Right arrow Articles by RAMSAY, A. T. S.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Journal of the Geological Society; 1995; v. 152; issue.5; p. 735-738;
DOI: 10.1144/gsjgs.152.5.0735
© 1995 Geological Society of London

Article

Benthic foraminiferal evidence for the existence of an early Miocene oxygen-depleted oceanic water mass?

C. W. SMART & A. T. S. RAMSAY

Department of Earth Sciences, University of Wales College of Cardiff, PO Box 914, Cardiff CFl 3YE, UK

This study presents new data derived from changes in benthic foraminiferal assemblages between 24 and 8 Ma in the Atlantic and Indian oceans which are integrated with published stable isotope and fauna1 records. We have identified an intermediate to deep water mass which was lower in oxygen and was restricted to the NW Indian, Atlantic and the Tethys (Mediterranean) oceans. Our interpretations are based on the coeval occurrences (19.5–16.5 Ma) of high abundances of smooth-walled bolivinids in these oceans. Our observations agree with the interpretations of previous workers for the occurrence of Tethys-derived intermediate and deep water in the northern Indian Ocean between 24 and 14 Ma and for Northern Component Water production in the Atlantic Ocean between 20 and 16 Ma. The water mass defined by these bolivinids formed a southward flowing Northern Component Water in the Atlantic Ocean and contributed, via Tethys, to the intermediate and deep water input into the Indian Ocean.


Keywords: Miocene, foraminifera, bottom water, palaeoceanography.




This article has been cited by other articles:


Home page
 MicropaleontologyHome page
C. W. Smart and E. Thomas
Emendation of the genus Streptochilus (Foraminifera) and new species from the lower Miocene of the Atlantic and Indian Oceans
Micropaleontology, 2007; 53: 73 - 103.
[Abstract] [Full Text] [PDF]

Home page
 GeologyHome page
C. W. Smart and E. Thomas
The enigma of early Miocene biserial planktic foraminifera
Geology, 2006; 34: 1041 - 1044.
[Abstract] [Full Text] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
T. J. S. Sykes, A. T. S. Ramsay, and R. B. Kidd
Southern hemisphere Miocene bottom-water circulation: a palaeobathymetric analysis
Geological Society, London, Special Publications, 1998; 131: 43 - 54.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
A. T. S. Ramsay, C. W. Smart, and J. C. Zachos
A Model of early to middle Miocene Deep Ocean circulation for the Atlantic and Indian Oceans
Geological Society, London, Special Publications, 1998; 131: 55 - 70.
[Abstract] [PDF]