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The environment of the Permian Glacial sedimentation of Tasmania: with particular reference to the base of the Permian

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Ahmad, N (1957) The environment of the Permian Glacial sedimentation of Tasmania: with particular reference to the base of the Permian. PhD thesis, University of Tasmania.

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Abstract

In Tasmania during the Lower Permian Epoch glaciers
not only reached sea level but in places extended on the
sea as shelf ice. Where-ever glaciers rested on tbe
land tillites were deposited but under the shelf ice deposits of various types were laid down.
During this time icebergs were quite common and
large iceborne erraticd were deposited side by side witb
marine fossils. Conditions both on land and sea were
very similar to those that exiat today in the Antarctic
region.
Tba glaciers flowed in part from a land mass lying west of the present west coast of Tasmania, which lay
within 40° of the South Pole.
Waxing and waning of the glaciers is indicated by
differences in the sediments, and by increase and decrease in tbe number and size of the erratica.
The gradual retreat of the ice sheet was followed
by warm water sediments in the Trissic Period.

Item Type: Thesis (PhD)
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Date Deposited: 03 Dec 2013 21:59
Last Modified: 15 Sep 2017 01:07
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