Abstract
THE planktonic foraminiferal species Guembelitria stavensis Bandy (Fig. 1) lived in the austral gulf sea between Australia and Antarctica during the Oligocene, and with the final separation of the two continents at the eastern hinge of the South Tasman Rise, it spread out eastwards into the south-western Pacific. The palaeogeographical distribution and the very short stratigraphic range of G. stavensis in the south-western Pacific provides the first palaeontological evidence of the initiation of the proto circum-Antarctic current in the lower part of the Upper Oligocene.
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