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Late Pliocene dinoflagellate cyst and diatom analysis from a high resolution sequence in DSDP Site 594, Chatham Rise, south west Pacific

journal contribution
posted on 2023-05-16, 13:04 authored by Andrew McMinnAndrew McMinn, Howard, W, Roberts, D
A high resolution mixed carbonate and siliciclastic sequence from DSDP Site 594 contains a detailed record of climate change in the late Pliocene. The sequence can be accurately dated by the LAD of Nitzschia weaveri, the LAD of Thalassiosira insigna, the LAD of T. vulnifica and the LAD of T. kolbei diatom datums. Carbonate content and δ18O signatures provide added resolution and place the sequence between isotope stages 100 and 92. The sequence contains well-preserved and diverse dinoflagellate cyst floras. Use of principal component (PCA) and canonical correspondence analyses (CCA) identifies changes in the assemblages that principally reflect warming and cooling trends. Species associated with warmer climates included Impagidinium patulum, I. paradoxum and I. sp. cf. paradoxum while those from cooler climates include Invertecysta tabulata and I. velorum. CCA is shown to be a valuable method of determining the past environmental preferences of extinct species such as I. tabulata. © 2001 Elsevier Science B.V. All rights reserved.

History

Publication title

Marine Micropaleontology

Volume

43

Issue

3-4

Pagination

207-221

ISSN

0377-8398

Department/School

Institute for Marine and Antarctic Studies

Publisher

Elsevier Science BV

Place of publication

Amsterdam

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the earth sciences

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