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Assessing geoheritage values: A case study using the leschenault peninsula and its leeward estuarine lagoon, south-western Australia

Brocx, M. and Semeniuk, V. (2011) Assessing geoheritage values: A case study using the leschenault peninsula and its leeward estuarine lagoon, south-western Australia. Proceedings of the Linnean Society of New South Wales, 132 . pp. 115-130.

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Abstract

To further the disciplines of geoheritage and geoconservation, a Geoheritage "tool-kit" has been developed to systematically compile an inventory at various scales of geological and geomorphological features in a given area, assess their levels of significance, and address whether geoheritage features are treated in isolation or as inter-related suites that should be conserved as an ensemble. The Leschenault Peninsula, a retrograding Holocene dune barrier in south-western Australia, and its leeward estuarine lagoon, provide a case study of the application of this tool-kit. The barrier-and-lagoon is unique in Western Australia and comprises a wide variety of geological and geomorphological features, from large to fine scale, and varying in significance from International to State-wide to Regional. Some key features include: active parabolic dunes; an interface between dunes and estuary that is the most complex sedimentologically, hydrologically, and ecologically in Western Australia; a stratigraphy recording a complex Holocene sea level history; barrier retreat marked by parallel bands of submerged beach rock; and a sheet of calcrete above the water table. In terms of geoconservation, addressing the various features of geoheritage value in this area is best achieved by viewing the system as an integrated geopark of interactive processes, geology, and geomorphology.

Publication Type: Journal Article
Murdoch Affiliation: School of Environmental Science
Publisher: Linnean Society of NSW
URI: http://researchrepository.murdoch.edu.au/id/eprint/18640
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