Ayling, B. 2005.   Glacial sediments and cap carbonate sequences in the Umberatana Group: Evidence for a snowball Earth?. In: (Eds.) Amos Aikman, Katherine Lilly, Julien Celerier, Istvan Kovacs, and Giselle Estermann, An excursion guide to the Flinders Ranges, South Australia, Journal of the Virtual Explorer, Electronic Edition, ISSN 1441-8142, volume 20, paper 3, doi:10.3809/jvirtex.2005.00126

Glacial sediments and cap carbonate sequences in the Umberatana Group: Evidence for a snowball Earth?

Bridget Ayling

Research School of Earth Sciences, The Australian National University, Canberra, 0200, Australia

<bridget.ayling@anu.edu.au>

Abstract

The Umberatana Group brackets two of the largest glaciations in Earth's history - the Sturtian and Marinoan glaciations. In the central Flinders Ranges, several interesting aspects of the Umberatana Group are exposed, particularly in the vicinity of the Enorama Diapir. Here continued movement of the diapir after the group was deposited has resulted in exposure of the complete group within a relatively small area (see Figure 1).

Keywords: Snowball Earth, Umberatana, cap carbonate

Table of Contents

Introduction
Glacial sediment characteristics
Cap carbonates
Glacial sediment/cap carbonate sequences in the Umberatana Group
Sturtian Glacial sequence (central Flinders Zone): Holowilena Ironstone, Wilyerpa Formation, Tindelpina Shale Member.
Marinoan Glacial sequence (central Flinders Zone) : Elatina Formation, Nuccaleena Formation.
References
List of Figures
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