The earliest dingo skeletal remains in Australia are estimated at 3,450 YBP from the Mandura Caves on the Nullarbor Plain, in southeastern Western Australia; 3,320 YBP from Woombah Midden near Woombah, New South Wales; and 3,170 YBP from Fromme's Landing on the Murray River near Mannum, South Australia. Dingo bone fragments were found in a rock shelter located at Mount Burr, South Australia in a layer that was originally dated 7,000-8,500 YBP. Excavations later indicated that the levels had been disturbed, and the dingo remains probably moved to an earlier level. The dating of these early Australian dingo fossils led to the widely-held belief that dingoes first arrived in Australia 4,000 YBP and then took 500 years to disperse around the continent. However, the timing of these skeletal remains were based on the dating of the sediments in which they were discovered, and not the specimens themselves.