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Quantitative palaeoclimate estimates from Late Cretaceous and Paleocene leaf floras in the northwest of the South Island, New Zealand

Kennedy, Elizabeth M.; Spicer, Robert A. and Rees, Peter M. (2002). Quantitative palaeoclimate estimates from Late Cretaceous and Paleocene leaf floras in the northwest of the South Island, New Zealand. Palaeogeography, Palaeoclimatology, Palaeoecology, 184(3-4) pp. 321–345.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/S0031-0182(02)00261-4
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Abstract

Three new plant macrofossil assemblages were collected from Late Cretaceous and Paleocene fluvio-lacustrine sediments of the Pakawau and Kapuni groups in the northwest of the South Island, New Zealand. Palaeoenvironmental interpretations were made from each locality and palaeoclimate was deduced from the dicotyledonous angiosperm leaf component of each flora. A latest Cretaceous (Pakawau Bush Road locality) flora yielded 58 different dicotyledonous leaf forms; the two Paleocene collections, Ian's Tip and Pillar Point Track, included 23 and 28 dicotyledonous leaf forms respectively. Quantitative palaeoclimate estimates were obtained using both Leaf Margin Analysis (LMA) and the Climate Leaf Analysis Multivariate Program (CLAMP). Temperature estimates suggest that there was a slight cooling from the latest Cretaceous into the early Paleocene in the northwest Nelson region of New Zealand, supporting similar Southern Hemisphere palaeoclimate findings from Antarctic data. Consistency in temperature estimates using different methods, including LMA, multivariate leaf morphological analysis (CLAMP), oxygen isotope data, regional versus local studies and global palaeoclimate models, suggests that the mean annual temperature for the Pakawau region in the latest Cretaceous was between 12 and 15°C. LMA produced temperature estimates between 6.5 and 8°C for the two Paleocene assemblages whereas CLAMP-produced estimates were slightly higher between 9 and 12.5°C © 2002 Elsevier Science B.V. All rights reserved.

Item Type: Journal Article
ISSN: 0031-0182
Keywords: Late Cretaceous; Leaf physiognomy; New Zealand; Palaeoclimate; Paleocene
Academic Unit/Department: Science > Environment, Earth and Ecosystems
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 5032
Depositing User: Robert Spicer
Date Deposited: 20 Jul 2006
Last Modified: 02 Dec 2010 19:53
URI: http://oro.open.ac.uk/id/eprint/5032
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