Dominantly marine shale and siltstone, calcareous in part, minor sandstone and limestone. Mainly lower Wilpena Group.
ABC RANGE QUARTZITE
Quartzite, slightly feldspathic, fine to medium grained, pale pinkish grey, clay intraclasts, flaggy to medium bedded, heavy mineral lamination, minor siltstone.
Siltstone, shale, red-brown and olive green, laminated, flaggy to medium bedded; alternating with sandstone, fine grained, occasionally coarse grained. All lithologies calcitic in part.
Heavy mineral lamination is visible in the ABC Range 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.