KANYAKA STATION RUINS
GEOLOGY
SOUTH AUSTRALIA
ARROWIE BASIN (ADELAIDE GEOSYNCLINE)
Hawker Group
Dominantly marine shale and siltstone, calcareous in part, minor sandstone and limestone. Mainly lower Wilpena Group.
CAMBRIAN
Atdabanian to Botomian
Wilkawillina Limestone
Archaeocyath-calcimicrobe limestone
NEOPROTEROZOIC
Marinoan
Parachilna Formation
Sandstone, upward-fining; siltstone and minor carbonate interbeds. Trace fossils include Diplocraterion, and Bemella. (RETURN TO SITE)
CAMBRIAN
MinageAtdabanian
ARROYO/DRY WASH
The arroyo that exists next to the Kanyaka Station Ruins which has cut into the side of the Wilkawillina Limestone creating an angled slope, the dry river bed is comprised of medium sized pebbles which have been rounded by river flow and transportation. As river gravel accumulates the vertical erosion of the surrounding bedrock (Wilkawillina Formation) is reduced but the impact of the gravel when its moving by river flow can speed up canyon cutting.
Palmer Creek
Gravel distribution in rivers is a random process as each gravel clast moves at its own velocity and at different points can be stored in different periods at depth or in lateral deposits, and can get trapped in sediments several times before reaching the basin, this slows down its track. The age of the gravels and pebbles trapped in the dry wash may be much younger then the tectonic change of the source
DEATH ROCK
Death Rock is comprised of sandstone from the Parachilna Formation (RETURN TO SITE)
REFEreNCES
Carretier, S., Regard, V., Leanni, L. et al. (2019). Long-term dispersion of river gravel in a canyon in the Atacama Desert, Central Andes, deduced from their 10Be concentrations. Sci Rep 9, 17763.
South Australian Government. (n.d.). SARIG geological map. SARIG.