Stratigraphic relationships of Late Ordovician to Early Devonian rocks in the Huntley Quadrangle, south-western Tasmania

During mapping of the Huntley Quadrangle in south-western Tasmania, two new, important, graptolite-trilobite-brachiopod bearing sequences were found in the upper part of the Lower Palaeozoic succession. The stratigraphy of these sequences is described. To avoid confusion a new group and a new formation, which includes the Westfield Beds (sensu Corbett and Banks 1974), are proposed.