Bhaumik, Ajoy K. et al. (2007): Paleoceanographic evolution of the northeastern Indian Ocean during the Miocene; evidence from deep-sea benthic Foraminifera (DSDP Hole 216A)
Leg/Site/Hole:
Related Expeditions:
DSDP 22
Identifier:
ID:
2008-118143
Type:
georefid
Creator:
Name:
Bhaumik, Ajoy K.
Affiliation:
Indian Institute of Technology, Department of Geology and Geophysics, Kharagpur, India
Role:
author
Name:
Gupta, Anil K.
Affiliation:
University of Delhi, India
Role:
author
Name:
Raj, M. Sundar
Affiliation:
Role:
author
Name:
Mohan, K.
Affiliation:
Role:
author
Name:
De, Soma
Affiliation:
Role:
author
Name:
Sarkar, Sudipta
Affiliation:
Role:
author
Identification:
Title:
Paleoceanographic evolution of the northeastern Indian Ocean during the Miocene; evidence from deep-sea benthic Foraminifera (DSDP Hole 216A)
Year:
2007
Source:
In: Nigam, Rajiv (editor), Saraswat, R. (editor), Marine micropaleontological studies from the northern Indian Ocean
Publisher:
Council of Scientific & Industrial Research, New Delhi, India
Volume:
36
Issue:
4
Pages:
332-341
Abstract:
Statistical analyses (factor and cluster) were performed on 30 highest ranked deep-sea benthic foraminifer species from >149 mu m size fraction from Deep Sea Drilling Project Hole 216A to understand Miocene ( approximately 20.5 to approximately 7 Ma) paleoceanographic evolution of the northeastern Indian Ocean. Factor and cluster analyses enabled us to identify five biofacies defining five clusters. Known ecological preferences of benthic foraminifera were used for environmental interpretations. The faunal data documents a shift in deep-sea ventilation and productivity at 15-14 Ma, coinciding with the abrupt cooling in the middle Miocene. This coincides with the beginning of permanent ice sheets in Antarctica during the middle Miocene.
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:1.2744 West:90.1228 East:
90.1229 South:1.2743
Keywords: Stratigraphy; assemblages; benthic taxa; biofacies; Cenozoic; cluster analysis; Deep Sea Drilling Project; deep-sea environment; DSDP Site 216; faunal list; Foraminifera; Indian Ocean; Invertebrata; Leg 22; marine environment; microfossils; Miocene; Neogene; Ninetyeast Ridge; paleo-oceanography; paleoenvironment; Protista; statistical analysis; Tertiary;
.