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The Bonaparte Gulf Basin contains Palaeozoic rocks covering about 8000 square miles of land around the Joseph Bonaparte Gulf (Fig. 1); the larger part of the basin lies beneath the Timor Sea. Its landward part is truncated by a northeasterly fault zone from Precambrian rocks on the east; the southwestern margin overlaps Precambrian rocks of the Kimberley Block. The estuary of the Victoria River (Queens Channel) separates the landward part of the basin into two areas of outcrop-the southwestern area with Cambrian, Ordovician, and Devonian to lowermost Permian outcrops, and the northern part with Permian, possibly Lower Triassic, and Lower Cretaceous outcrops. This Bulletin describes the ostracods In the Upper Devonian fauna of the Bonaparte Gulf Basin, assesses their stratigraphical value, and is a part of the overall study of the Upper Devonian and Lower Carboniferous geology and palaeontology; it also represents the first taxonomic and biostratigraphic study of Upper Devonian Ostracoda from Australia.

The Bonaparte Gulf Basin is a north-pitching syncline of Phanerozoic sediments, which are bounded to the south by Precambrian rocks and extend northward beneath the Timor Sea (Fig. 1). The landward part of the basin has been fragmented by faults, uplift, and erosion into a main outcrop area and three outliers. The eastern edge of the original depositional basin corresponds approximately with the present eastern margin, but the original extent to the south and west is unknown. Within the main outcrop is a Precambrian inlier, the Pincombe Inlier, which influenced deposition during the Upper Devonian and Lower Carboniferous. The main outcrop (Fig. 2) comprises Lower Cambrian volcanics, and Cambrian, Lower Ordovician, Upper Devonian, Carboniferous, Permian, Lower Triassic, and Lower Cretaceous sediments. The outliers contain only the lower part of this sequence, up to and including the lower part of the Upper Devonian.

H51-B1/2840 Contour interval: 50

G50/B1-2643 Contour interval: 50

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Legacy product - no abstract available