Carboniferous – Permian Glacial Implications On Australia

632 words - 3 pages

Introduction
The repercussions of glaciation during the Carboniferous and Permian periods are found in landmasses that were once united to form the geological supercontinent, Gondwana. A series of fragmentation periods divided the supercontinent, ultimately lasting 500 million years (citation). The continents that were once unified include landmasses that today form part of the southern hemisphere including Antarctica, South America, Africa, India and Australia (citation). Australia formed the north-eastern part of the coast of Gondwana lying north of Antarctica (figure). Around 250 million years ago, the Permo-Carboniferous period was one of great glaciation. (citation) Glacial activity was ...view middle of the document...

This report will focus specifically on different glacial deposits that give evidence for Carboniferous-Permian glaciation in south, east and west Australia.
History of Carboniferous-Permian glaciation
Studies such as (citation) and (citation) have looked at evidence of alternating glacial and non-glacial successions. Limited evidence for this motif is a result of younger glacial beds overlying and destroying older deposits therefore predating the age of glacigenic sediments (citation). During the Carboniferous and Permian periods, tectonic uplift was also present which, with glacial erosion, eliminated most of the Late Carboniferous geological record. Furthermore, low diversity of biota endemic to Gondwana, of not well-defined time ranges, provided insufficient evidence (citation). However, stratigraphic and sedimentological data from New South Wales, Queensland and eastern Australia show that this Late Palaeozoic Ice Age consisted of eight discrete 1-8 million year glacial intervals and non-glacial intervals of similar duration. This demonstrated a pattern of "increasing...

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