The Carboniferous sequence in the Gloucester‐Myall Lake area, New South Wales

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Abstract
The stratigraphic succession of formations in the Myall district comprises in ascending order the Bunyah Beds, Wallanbah Formation, Kataway Mudstone, Boolambayte Formation (new names), Nerong Volcanics (E'ngel, 1962), Booti Booti Sandstone, Yagon Siltstone, Koolanock Sandstone, Muirs Creek Conglomerate (new names) and Alum Mountain Volcanics (Engel, 1962). The units range in age from possibly Devonian to possibly Permian, most being Carboniferous. The Mograni (new name), Tugrabakh (Voisey, 1940) and Mayers Flat Limestones (new name) are members of the Wallanbah Formation. The Violet Hill Volcanics (new name) is a member of the Yagon Siltstone. The Burdekins Gap Basalt Member and Lakes Road Rhyolite are members of the Alum Mountain Volcanics. Environments of deposition range from nonmarine (Nerong Volcanics, Alum Mountain Volcanics, Muirs Creek Conglomerate, upper part of Koolanock Sandstone) through shallow marine (Booti Booti Sandstone, lower part of Koolanock Sandstone, calcareous parts of Wallanbah Formation) to deep marine (most other units). Facies relationships indicate a progressive deepening of the sedimentary environment to the east throughout most of the Carboniferous sequence. The Tournaisian sequence is readily correlated with a similar sequence in the Rocky Creek and Belvue Synclines. Higher units are correlated with sequences at Gloucester (Campbell & McKelvey, 1972) and Booral (Campbell, 1962).

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