Benthic foraminiferal abundances from eight sites of the Northwest Australian shelf ...

Foraminiferal analysis of Miocene to recent strata of the Northwest Shelf of Australia is used to chart West Pacific Warm Pool (WPWP) influence. The assemblage is typified by "larger" foraminifera with ingressions of the Indo-Pacific "smaller" taxa Asterorotalia and Pseudorotalia...

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Bibliographic Details
Main Authors: Gallagher, Stephen John, Wallace, Malcolm W, Li, Chung Leong, Kinna, Belinda, Bye, John A T, Akimoto, Kazumi, Torii, Masayuki
Format: Dataset
Language:English
Published: PANGAEA 2009
Subjects:
Event label
DEPTH, sediment/rock
AGE
Foraminifera
Foraminifera, per unit sediment mass
Plankton
Foraminifera, benthic
Asterorotalia concinna
Asterorotalia gaimardii
Asterorotalia milletti
Asterorotalia sp.
Pseudorotalia schroeteriana
Pseudorotalia indopacifica
Pseudorotalia globosa
Pseudorotalia angusta
Assilina ammonoides
Nummulites venosa
Heterolepa margaritifera
Counting
Counting, foraminifera, benthic
Indian
Pacific
Torii
Ice Sheet
Online Access:https://dx.doi.org/10.1594/pangaea.758377
https://doi.pangaea.de/10.1594/PANGAEA.758377
Description
Summary:Foraminiferal analysis of Miocene to recent strata of the Northwest Shelf of Australia is used to chart West Pacific Warm Pool (WPWP) influence. The assemblage is typified by "larger" foraminifera with ingressions of the Indo-Pacific "smaller" taxa Asterorotalia and Pseudorotalia at around 4 Ma and from 1.6 to 0.8 Ma. A review of recent and fossil biogeography of these taxa suggests their stratigraphic distribution can be used to document WPWP evolution. From 10 to 4.4 Ma a lack of biogeographic connectivity between the Pacific and Indian Ocean suggests Indonesian Throughflow (ITF) restriction. During this period, the collision of Australia and Asia trapped warmer waters in the Pacific, creating a central WPWP biogeographic province from the equator to 26°N. By 3 Ma Indo-Pacific species migrated to Japan with the initiation of the "modern" Kuroshio Current coinciding with the intensification of the North Pacific Gyre and Northern Hemisphere ice sheet expansion. Indo-Pacific taxa migrated to the northwest ... : Supplement to: Gallagher, Stephen John; Wallace, Malcolm W; Li, Chung Leong; Kinna, Belinda; Bye, John A T; Akimoto, Kazumi; Torii, Masayuki (2009): Neogene history of the West Pacific Warm Pool, Kuroshio and Leeuwin currents. Paleoceanography, 24, PA1206 ...

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