Ibaraki, Masako (2002): Responses of planktonic Foraminifera to the emergence of the Isthmus of Panama

Leg/Site/Hole:
ODP 170
ODP 170 1039
Identifier:
2003-070475
georefid
Creator:
Ibaraki, Masako
Shizuoka University, Department of Biology and Geosciences, Shizuoka, Japan
author
Identification:
Responses of planktonic Foraminifera to the emergence of the Isthmus of Panama
2002
In: Tsuchi, Ryuichi (editor), Barron, John A. (editor), Molina-Cruz, Adolfo (editor), Pacific Neogene event studies for the 21st century; proceedings of the VII international congress on Pacific Neogene stratigraphy
Universidad Nacional Autonoma de Mexico, Instituto de Geologia, Coyoacan, Mexico
19
3
152-160
Pliocene-Pleistocene planktonic foraminiferal assemblages of the Esmeraldas section in northwestern Ecuador and of Hole 1039B off Costa Rica are analyzed. In the Esmeraldas section, an abrupt cooling of the sea-water temperature is recognized between 3.35 and 3.95 Ma, in which Neogloboquadrina spp. and intermediate water dwellers increase in abundance. In the section off Costa Rica, the sea-water temperature declined just before 4.2 Ma, when planktonic foraminifera become absent, but increased afterwards as evidenced by abundant occurrences in Zone N22 to the Recent. These faunal changes are considered to be responses to the emergence of the Isthmus of Panama.
English
Coverage:Geographic coordinates:
North:10.0000
West:-83.0000East: -76.0000
South:-3.0000
Stratigraphy; Invertebrate paleontology; biostratigraphy; biozones; Cenozoic; Central America; cores; Costa Rica; Ecuador; Esmeralda River; Foraminifera; Invertebrata; Leg 170; microfossils; Neogene; Ocean Drilling Program; ODP Site 1039; paleo-oceanography; paleoclimatology; paleoecology; paleogeography; Panama; planktonic taxa; Pleistocene; Pliocene; Protista; Quaternary; sea-level changes; South America; taxonomy; Tertiary;
.