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1-21 Landslip south west of Digby

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:

7122-389091. Ten kilometres south-west of Digby.

Access:

Dartmoor-Hamilton Road.

Geology/Geomorphology:

A combination of rotational slide and extensive earthflows occurs at this site. A spring at the base of the slide may lubricate the earthflows. The headwall of the slide exposes a fine ochre sand containing quartz pebbles and ferric concretions and fine ferruginous sands (Dorodong Sands) overlain by siliceous sand (Malanganee Sand). The slumped material and earthflows are partly vegetated. Minor tunnelling and gully have occurred at the base of the earthflow, close to the Dartmoor-Hamilton Road.


This is one of the largest slides in the Digby area and illustrates a complex of mass movement processes as well as providing a clear exposure of the Tertiary materials.

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