What is it about?

The paper presents the evidence for the presence of glaciers when Australia was much closer to the South Pole during the Early Cretaceous (140 - 145 million years ago) during a time widely believed to be a greenhouse Earth. Increasingly evidence from other parts of the world are challenging that latter view, but at the moment the only place on the face of the Earth where physical evidence of glaciers can be found is the northern Flinders Ranges, South Australia.

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Why is it important?

The northern Flinders Ranges is the only place on the face of the Earth where physical evidence for the presence of glaciers during the Early Cretaceous is found

Perspectives

This paper is the culmination of years of research with my co-authors during which we have built on the past work of many other geologists and extends the findings of Alley and Frakes (2003) for the first evidence of glacial ice at a site referred to as Recorder Hill. It is a distillation of the paleoclimatic story from a much bigger volume being written by Alley and Hore for the Geological Survey of South Australia, that expands on the evidence for glaciation and the broader climatic changes, establishes a revised stratigraphy for the southern Eromanga Basin, including new formations, develops a detailed sea level curve linked to Haq's work and tells the story of landsurface evolution during and since the Early Cretaceous. This work should be of great value to mineral and petroleum explorers, as well as in understanding groundwater distribution in the southern Great Artesian Basin. Most of all it is a great detective story that should intrigue not only researchers but also the general public. NF Alley (now retired) is proud to be associated with and to receive the support for the research from the Geological Survey of South Australia.

Neville Alley
Geological Survey of South Australia

Read the Original

This page is a summary of: Glaciations at high-latitude Southern Australia during the Early Cretaceous, Australian Journal of Earth Sciences, April 2019, Taylor & Francis,
DOI: 10.1080/08120099.2019.1590457.
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