STRATIGRAPHY AND PALAEONTOLOGY OF THE BUKALI AREA, MONTO DISTRICT, QUEENSLAND

Detailed mapping of the area reveals an Upper Palaeozoic sequence comprising: Cania Formation, approximately 680 m of volcanics, clastics, and rare limestones dateable as middle-late Toumaisian from conodont and brachiopod evidence; probable Caswell Creek Group equivalents, an indeterm inate thickness of Toumaisian volcanics, sandstones, siltstones, and limestones, with corals and conodonts; and Youlambie Conglomerate, up to 2 500 m of clastics and occasional lavas, of Early Permian age on the basis of a bivalve fauna. A palaeontological study extends the known ranges of some brachiopod species and records several undescribed forms of brachiopods, gastropods, bivalves, corals, and conodonts. Sedimentological investigation of diamictites in the Youlambie Conglomerate shows that they are apparently the result of subaqueous mass flow on an off-shore slope. INTRODUcrJON In the last 14 years detailed stratigraphic and palaeontological work on the Carboniferous and Permian formations in the Manto district has been carried out immediately to the south of Monto by Maxwell (1964), lull (1968) and McKellar ( 1967), and to the north by Dear (1968). Regional mapping of the Monto I:250 000 Sheet was completed by Dear, McKellar & Tucke