Large doline 60m in diam. and 25m deep; talus slope to two main large passages connected by a high window; total length of cave 1200m; three lakes at -80m; narrow airspace beyond third lake leads to 45m diam. dome and lake; another 30m sump leads off this...
Thousands of square metres in the cave are covered in parallel finger-marked geometric lines and patterns, Aboriginal Australian artwork which has been dated as 20,000 years old.[4][6]
The cave was abandoned 19,000 years ago, and rediscovered by archeologists in 1956.[6] Analysis of finger markings and archaeological deposits showed that Aboriginal people used the cave 22,000 years ago.[7]
The cave was explored by an expedition led by Captain J. M. Thompson in 1935. The team entered the cave by a ladder and found themselves in a chamber 244 metres (800 ft) in circumference and walked down tunnels over 366 metres (1,200 ft) in length.[2]
In the 1960s, the cave was excavated by Alexandor Gallus, who found that Aboriginal people had mined flint there.[8]
In December 2022, it was reported that some of the artwork was destroyed by vandals who had illegally gained access to the cave at some time since June, prompting calls from the local Mirning people, who consider the site to be sacred, for the state and federal governments to improve security and legal protection for the cave.[13][14] In March 2023 the Australian Government pledged $400,000 to improve the security of the cave, including the installation of cameras.[7]
^DeGaris, R.C. (30 May 1968). "ABORIGINAL AND HISTORIC RELICS PRESERVATION ACT, 1965: NORTH OUT OF HUNDREDS—PROHIBITED AREA DECLARED"(PDF). The South Australian Government Gazette. Government of South Australia. p. 1641. Retrieved 15 August 2019. Site of Koonalda Cave (Latitude 31° 24' 18" South, Longitude 129° 49' 50" East), approximately 4 miles north of the Eyre Highway and situate within pastoral block 297B, north out of hundreds, out of counties.