AUSTRALIA/Proterozoic 213 Figure Docking with Laurentia, 1600 1200 Ma Craton The overlying $1800-My-old Kimberley Group was derived from the north The intrusion of the voluminous Hart Dolerite $1790 Ma may be related to a continental breakup, possibly from Laurentia, centred to the north (Figure 3) To the south-east of the Halls Creek Orogen, the Granites–Tanami Complex and the northern part of the Arunta Inlier developed on the thinned Archaean to Early Palaeoproterozoic basement of the Lucas Craton (Figure 3) The