WATERFALL GULLY & CLELAND
Because of heavy vegetation cover and lack of visible outcrops in the area geology reports do have gaps so new research could change previous reports.
The Waterfall Gully region is plunging to the south, this forms a south pitching anticline, at the western edge of the anticline the Beaumont Fault cuts it off. Synclines are also recorded within the area, the western side is still largely unknown other than the fact that it's west-dipping, the eastern side of the syncline is abruptly cut off by the Clarendon-Ochre Cove Fault.
Fluviodeltaic sandstone, conglomerate, siltstone and minor dolomite.
Minor folding is visible within the slate and siltstone of the younger portions in the Saddleworth Formation
The Stonyfell Quartzite was deposited during the Torrensian during the Neoproterozoic
Folding has not affected the massive block of quartzite within Waterfall Gully and it dips slightly to the south-west, stong crossbedding visible within quartzite which was formed before metamorphism, because of the visible crossbedding this has revealed that the beds have not been overturned.
The Stonyfell Quartzite is comprised of 3 Members:
.Wattle Park Member (Visible Throughout The Summit Hike)
The Wattle Park Member is comprised of major Quartzite with feldspathic coarse-grained sandstone and shale.
.Slapes Gully Member (Visible Up Past The Second Falls)
Within the Slapes Gully Member, Sandstone is feldspathic, calcareous and silty. Calcareous shale interbeds and thin quartzite bands are also visible in the member.
.Greenhill Member (Not Visible In Waterfall Gully)
Comprised of sandstone and quartzite.
Australian Government, Geoscience Australia. (n.d.). Backstairs Passage Formation | Australian Stratigraphic Units Database, Geoscience Australia. Last update: September 3, 2019.
Ayres, D. E. (1959). Report on the Waterfall Gully – Brook Gully area. The University of Adelaide.
South Australian Government. (n.d.). SARIG geological map. SARIG.
Victor Tokarev. (2005, February). Neotectonics of the Mount Lofty Ranges (South Australia). Adelaide University - school of Earth Science & Environmental Sciences, Geology & Geophysics.