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4-13 Collapse depression on the Tyrendarra lava flow near Ettrick

This information has been developed from the publications:
  • An assessment of the Geological/Geomorphological Significance of Private Land in the Shire of Portland (1981) by N. Rosengren, J Mallen, T Shepherd.
Geological heritage sites, including sites of geomorphological interest and volcanic heritage sites, are under regular revision by the Geological Society of Australia, especially in the assessment of significance and values. Reference should be made to the most recent reports. See the Earth Science Heritage section of the Geological Society of Australia website (external link) for details of geological heritage reports, and a bibliography.

Locality:

7221-687773. Two kilometres south-east of Homerton.

Access:

Woolsthorpe-Heywood Road.

Geology/Geomorphology:

This site comprises a depression approximately 600 metres x 300 metres x 10 metres (depth) opening towards the south where it is drained by intermittent streams.

Significance:

Regional. This is the largest of several depressions on the surface of the Tyrendarra flow which were formed by the draining of fluid lava beneath the hardened lava crust.

Management:

Quarrying should be prohibited as this would destroy the form of the site.
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