GSV Report 91 - Kilmore 1:50 000 map geological report
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Product description:Download The downloadable version of this report is supplied in PDF format (30.7MB). Abstract This report describes the geology of the area covered by the Kilmore 1:50,000 mapsheet. It gives a comprehensive account of the physiography, geological history and landscape evolution, Palaeozoic and Tertiary rock units, structural and economic geology and groundwater resources, and of previous geological work. Particular emphasis is placed on the Palaeozoic rock sequence, which is the only rock sequence in Australia with a complete record of Early Cambrian to Early Silurian deposition. The Cambrian consists of three formations: the Mount William Metabasalt (submarine basalts and sediments), the Monegeetta Shale (mostly dark shale) and the Goldie Chert (chert and mudstone). The Ordovician is dominated by quartz-mica turbidites, mudstones and shales. The Lower Ordovician part consists of five new formations (Lano Gully Sandstone, Stauro Gully Shale, Split Hill Sandstone, Bryo Gully Shale and Angry Hill Sandstone) grouped together into the Romsey Group. The Upper Ordovician consists of three formations (Riddell Sandstone, Bolinda Shale and Darraweit Guim Mudstone), of which the highest contains significant carbonate. In the Silurian sequence there is no black shale and its place is taken by mudstones, often with burrowing structures. Four formations are recognized: the Deep Creek Siltstone, Springfield Sandstone (dominated by thick-bedded turbidites and with three thin coarse-grained bands mapped as members), Chintin Formation (consisting of mass-flow silts and sands) and the thick Kilmore Siltstone. Only a single deformation is recognized, the Middle Devonian Tabberabberan Deformation. Various structures are described, including the important Mount William Fault Zone which separates the Melbourne 'Trough' on the east from the Bendigo-Ballarat Zone on the west. Numerous photographs and line drawings complement the text. A comprehensive list of literature references is provided. Bibliographic reference VandenBerg, A.H.M., 1991. Kilmore 1:50 000 map geological report. Geological Survey of Victoria Report 91. Related products:
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