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Thirlmere Lakes, N.S.W.: geomorphic environment and evolution

thesis
posted on 28.03.2022, 22:00 authored by Patricia C Vorst
Thirlmere Lakes, N.S.W., are located in an incised former river valley which has undergone considerable infilling with sediments prior to, and possibly during the formation of the lakes. -- Research into the geomorphic processes operating in and around the lakes has shown that organic sediment, in the form of sedge peat, is the main type of deposit accumulating in the lakes at the present time. Past lake level changes are indicated by, firstly, alternation of fine with coarse inorganic sediment in the marginal areas of the lakes reflecting oscillations in the location of the littoral zone; secondly, changes in the aquatic vegetation zonation; and, thirdly, the formation of peat islands. Bushfire appears to be a major influence on the initiation of sediment transport on the surrounding hillslopes and alluvial fans. -- Lacustrine facies at depth in the valley fill indicate more extensive lacustrine deposition in the valley in the past, and lake formation may be related to tectonic uplift of the area since the Late Tertiary period.

History

Table of Contents

Introduction -- Physiography of the study area -- Lake basin form and process -- Valley fill stratigraphy -- The origin and evolution of the Thirlmere Lakes basin -- Conclusions.

Notes

Bibliography: leaf [BL1]-BL5

Awarding Institution

Macquarie University

Degree Type

Thesis bachelor honours

Degree

Thesis (B.A. (Hons.)), Macquarie University

Year of Award

1975

Rights

Copyright disclaimer: http://www.copyright.mq.edu.au Copyright Patricia C. Vorst 1975.

Language

English

Extent

various pagings ill., maps

Former Identifiers

mq:20079 http://hdl.handle.net/1959.14/175055 1559341