By Bill J Mitchell

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1 Baru and Diprotodon skulls at Alcoota. Photograph © of the Museum and Art Gallery of the Northern Territory Alcoota occupies an intermediate temporal position between, for example, the Riversleigh (Qld) and Naracoorte (SA) World Heritage sites, and it is younger than the Lake Eyre Basin Etadunna and Wipajiri Formation assemblages (SA) that stand as the reference standards for the base of the Australian land mammal biochronological scheme (a framework of relative ages for land mammals based on biocorrelation between vertebrate faunas).

The pioneering investigation of the site by Woodburne is of historical significance as a key element in the Australian land mammal biochronological 2. Northern territory scheme for the Australian continent first articulated by Stirton and colleagues. The site was known to Aboriginal people and pastoralists at the time of the first scientific investigations. Aboriginal residents on Alcoota pastoral station recognise it as a significant site, but not one of secret or sacred cultural significance.

Mitchell then sent a large collection of fossils from Wellington Caves to Europe for examinations by Georges Cuvier and Owen. Cuvier may never have seen the samples, though he commented on some of them. As a major part of his life work, Sir Richard Owen was progressively able to identify a number of large extinct marsupials and birds first from the Wellington Caves and then from a number of other important nineteenth century mammal fossil sites. His involvement continued until 1888 when, aged 84, he published his last paper on Wellington Caves fossils.

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