Foliar physiognomic climate estimates for the Late Cretaceous (Cenomanian–Turonian) Lark Quarry fossil flora, central-western Queensland, Australia

Fletcher, Tamara L., Moss, Patrick T. and Salisbury, Stephen W. (2014) Foliar physiognomic climate estimates for the Late Cretaceous (Cenomanian–Turonian) Lark Quarry fossil flora, central-western Queensland, Australia. Australian Journal of Botany, 61 8: 575-582. doi:10.1071/BT13197


Author Fletcher, Tamara L.
Moss, Patrick T.
Salisbury, Stephen W.
Title Foliar physiognomic climate estimates for the Late Cretaceous (Cenomanian–Turonian) Lark Quarry fossil flora, central-western Queensland, Australia
Journal name Australian Journal of Botany   Check publisher's open access policy
ISSN 0067-1924
1444-9862
Publication date 2014-03-21
Year available 2013
Sub-type Article (original research)
DOI 10.1071/BT13197
Open Access Status Not yet assessed
Volume 61
Issue 8
Start page 575
End page 582
Total pages 8
Place of publication Collingwood, VIC, Australia
Publisher C S I R O Publishing
Language eng
Abstract Although there is a broad knowledge of Cretaceous climate on a global scale, quantitative climate estimates for terrestrial localities are limited. One source of terrestrial palaeoproxies is foliar physiognomy. The use of foliar physiognomy to explore Cretaceous assemblages has been limited, and some of its potential sources of error have not been fully explored. Although museum collections house a wealth of material, collection bias toward particular taxa or preservation qualities of specimens further magnifies existing taphonomic bias to cold temperatures. As a result, specific collection for foliar physiognomy can be necessary. Here, we conduct three foliar physiognomic analyses on the early Late Cretaceous Lark Quarry flora and assess the results in the context of other proxies from the same formation. Our results suggest that the climate at the Cenomanian-Turonian boundary in central western Queensland was warm and had high precipitation (leaf-area analysis: 1321mm+413mm - 315mm mean annual precipitation; leaf-margin analysis: 16.4 degrees C mean annual temperature, 5.3 degrees C binomial sample error; climate leaf-analysis multivariate program: 16 +/- 2 degrees C for mean annual temperature, 9-month growth season, 1073 +/- 483mm growth-season precipitation). Our analysis also gave higher mean annual temperature estimates than did a previous analysis by climate leaf-analysis multivariate program, based on museum collections for the Winton Formation.
Formatted abstract
Although there is a broad knowledge of Cretaceous climate on a global scale, quantitative climate estimates for terrestrial localities are limited. One source of terrestrial palaeoproxies is foliar physiognomy. The use of foliar physiognomy to explore Cretaceous assemblages has been limited, and some of its potential sources of error have not been fully explored. Although museum collections house a wealth of material, collection bias toward particular taxa or preservation qualities of specimens further magnifies existing taphonomic bias to cold temperatures. As a result, specific collection for foliar physiognomy can be necessary. Here, we conduct three foliar physiognomic analyses on the early Late Cretaceous Lark Quarry flora and assess the results in the context of other proxies from the same formation. Our results suggest that the climate at the Cenomanian–Turonian boundary in central western Queensland was warm and had high precipitation (leaf-area analysis: 1321 mm + 413 mm – 315 mm mean annual precipitation; leaf-margin analysis: 16.4°C mean annual temperature, 5.3°C binomial sample error; climate leaf-analysis multivariate program: 16 ± 2°C for mean annual temperature, 9-month growth season, 1073 ± 483 mm growth-season precipitation). Our analysis also gave higher mean annual temperature estimates than did a previous analysis by climate leaf-analysis multivariate program, based on museum collections for the Winton Formation.
Keyword Plant Sciences
Plant Sciences
PLANT SCIENCES
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID LP0776851
Institutional Status UQ

 
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Created: Tue, 01 Apr 2014, 21:32:38 EST by Helen Smith on behalf of School of Biological Sciences