Srinivasan, M. S.; Sinha, Devesh K. (2003): Planktic foraminiferal biogeography and ocean circulation in Southwest Pacific during last 3.3. My. Gondwana Geological Society, Nagpur, India, In: Kundal, Pradeep (editor), Recent developments in Indian micropaleontology, Special volume 6, 23-31, georefid:2006-001162
Abstract:
Biogeographic patterns of significant tropical to cool subtropical planktic foraminifera from Leg 90 Deep Sea Drilling Project (DSDP) sites have been quantitatively mapped for the last 3.3. my in the Southwest Pacific. Marked differences are apparent in the biogeographic distribution of the Menardella and Globoconella groups before and after 1.77 Ma reflecting changes in surface water circulation. Spatial distribution of Neogloboquadrina pachyderma changed very little in the last 3.3 my except that its frequency increased around 2.58 Ma and again, at 0.78 Ma. The Menardella group established its present day distribution pattern in the Southwest Pacific at 1.77 Ma (Top of Olduvai) and Globigerinoides spp. at 0.78 Ma (Base of Brunhes). The distribution pattern of Globigerina bulloides shows an interval of intense upwelling at 2.58 Ma.
Coverage:
West: 158.2953 East: 163.2131 North: -.2950 South: -31.1002
Relations:
Data access: