A view of the Copley Quartzite formation that contains Aroona Dam, and in the distance the Brachina siltstone formation of the Bayley Range.
The distinctive peaks of Arkaroola as seen from the north of the Gammon Ranges.
North of the quartzite pound are precambrian formations of shale and limestone of the Tapley Hill and Aberoona formations.
Groundwater coming up through rock layers as springs are essential to life in the Flinders Ranges.
Dramatic Mamma clouds forming over Lyndhurst Ochre Pit.
Blinman diapir is an area of igneous intrusion, including this unusual Gneiss outcrop on the roadside of Glass Gorge, 200m past the grid heading west from Blinman.
The Nuccaleena Formation is a narrow pink dolomite layer that is frequently found in outcrops across the Flinders Ranges, and is described as being a good ‘geological marker horizon’.
This Nuccaleena Formation outcrop, just 5m wide, is seen in Parachilna Gorge, between the Brachina Formation siltstones and the older calcereous Elatina and Trezona Formations.Continue reading “Pink Dolomite: the Nuccaleena Formation”
At 10.2 kilometres in from the turnoff from the Outback Hwy into Parachilna Gorge, the geological boundary between Precambrian period and Cambrian period sediments can be sighted.Continue reading “Early complex life at the Precambrian / Cambrian boundary”
Outcropped Silcrete and Sand Calcite are a recurring combination, as seen here in Copley and along the Strzelecki Track.
Unusual goethite formations found in the Leigh Creek area.