Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6349838 | Palaeogeography, Palaeoclimatology, Palaeoecology | 2015 | 9 Pages |
Abstract
Although the mid- to Late Cretaceous is regarded as a global warm period, increasingly a more complex picture of warming and cooling is emerging. New techniques allow more precise dating of terrestrial localities, opening opportunities for using climate proxy approaches on terrestrial fauna and flora to better capture the complexity of Cretaceous climate. Here an attempt is made to understand the seasonality and inter-annual variability of two newly dated localities from the upper preserved portion (Cenomanian-Turonian) of the Winton Formation, Australia. Primarily quantitative approaches to palaeodendrology are used. The results suggest both seasonality and high variability in climate conditions that affect growth between years, including evidence for floods. The longest series (QM F44338) suggests oscillatory patterns of good and poor growth in a 15Â year alternating cycle similar to the contemporary Pacific Decadal Oscillation, although other potential explanations should be considered and tested.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth-Surface Processes
Authors
Tamara L. Fletcher, Patrick T. Moss, Steven W. Salisbury,