and volcanolithic sandstone were deposited during the Early Permian (Jochmus Fm), and was followed by east–west contraction (Cattle Creek Event) that produced the Mid-Permian unconformity across the basin. Thermal subsidence (Aldebaran and Bellata events) in the Late Permian – Early Triassic generated widespread continental siliciclastics with coal and some marine sandstone across the basin. Subsequent uplift (Clematis Event) produced a wide spread Lower Triassic unconformity and was followed by fluvial quartz-rich sandstone, then lacustrine and fluvial mudstone, siltstone, and sandstone comprising the basal sequence of the Great Artesian Basin. Sedimentation ended during the Mid Triassic Hunter-Bowen Orogeny (Showgrounds and Goondiwindi events). Compression during the Late Cretaceous – Oligocene formed antiforms over faults in the basin. Geological structures & depocentres The Nebine Ridge and Springsure Shelf are structural highs that separate the Galilee Basin from the Bowen Basin to the south east. The Canaway Ridge separates the Galilee Basin from the Cooper Basin to the south west. The Galilee Basin contains up to 3000m of siliciclastics, coal, diamictite and tuffaceous units. The basin has three main depocentres: Lovelle Depression (>730 m of Early Permian – Middle Triassic) in NW; Koburra Trough (>2800 m of Late Carboniferous – Middle Triassic strata) in NE; and Powell Depression (>1700 m of Early Permian – Middle Triassic strata) in the south. Stratigraphy The geological units within the Galilee Basin are outlined below. A stratigraphic section of the northern, eastern and southern regions of the Galilee Basin is provided within "the Hydrostratigraphic sequence of the Cenozoic, the Eromanga Basin and Galilee Basin". Economic geology The Galilee Basin contains deposits of thermal coal and has been described as Australia's newest mining province. There are currently no operating coal mines in the Galilee Basin. Bravus Mining & Resources is expected to start production of thermal coal in late 2021. Exploration of coal seam gas, conventional oil and tight oil and shale gas resources is also being conducted. In 1981, the Queensland Department of Mines estimated that demonstrated resources reached 800 million tonnes near Alpha alone. In 2008, Waratah Coal announced the discovery of 4,400 million tonnes of coal in the basin. Geoscience Australia reports 15 mineral deposits within the Galilee Basin which include; Kevins Corner, Pentland, Alpha (Hancock), Alpha North, South Alpha, Galilee (Liberty), South Galilee, Carmichael, Pentland (United), Hughenden, White Mountain (Clyde Park), Yellow Jacket, South Pentland, Milray, Hyde Park Coal Project. Unconventional gas Exploration for coal