Abstract

The Denison trough is a part of the Bowen basin (Queensland) whose greatest depositional expression was during the Permian. The Permian rocks of the trough are divided into the lower, middle, and upper Bowen beds. The lower and upper sequences, although the trough retained its identity during the time of their deposition, are similar to other sediments in the basin. The middle Bowen, however, consists of marine beds interrupted by five regressions with deposition of sandstones in those intervals. Major folding in the trough occurred during the Triassic and Jurassic although minor adjustments are evident as early as Permian and again in the Tertiary. Wet gas has been encountered and source beds of petroleum exist in the section. Discoveries of hydrocarbons may be anticipated in sandstones under favorable structural conditions.

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