Authors / CoAuthors
Liu, S.F. | Raymond, O.L. | Retter, A.J. | Stanley, S.P. | Percival, D.S.
Abstract
<p>The 1:1 million scale Geology of Tasmania dataset is generalised from the 1:500 000 scale 'Geology of Tasmania' map published in 1999 by the Tasmanian Geological Survey, with updated granite nomenclature from the 2005 1:500000 scale 'Tasmanian Granites and Associated Mineralisation' map. <p>The geology of Tasmania consists of a wide range of sedimentary, igneous and metamorphic rocks. The oldest rocks are Proterozoic clastic sedimentary rocks of the Tyennan and Rocky Cape Regions, which form basement cores in the central-west and north-west of Tasmania respectively. Low to medium grade metamorphic rocks are found in the Arthur Metamorphic Complex along the Arthur Lineament on the eastern margin of the Rocky Cape Region. The economically significant middle Cambrian Mt Read Volcanics, comprising calc-alkaline felsic to mafic volcanics, related intrusives and associated volcanosedimentary rocks, occur in an arcuate belt in the western part of Tasmania. The late Cambrian to early Devonian Wurawina Supergroup, including the Eldon, Gordon and Denison Groups, is a sequence of mainly clastic sediments (siltstone, shale, sandstone, conglomerate) and minor limestone. The supergroup overlies the Mt Read Volcanics and crops out in the western and central parts of the state. <p>The early Ordovician to early Devonian Mathinna Group, comprised of predominantly turbiditic metasediments, crops out in the north-east of the state. It is intruded by a suite of middle Devonian to early Carboniferous granitoids which extends across the northern part of Tasmania. <p>The late Carboniferous to Triassic Parmeener Supergroup of the Tasmania Basin crops out over much of the state. It consists of Triassic fluviolacustrine and Permian glaciomarine sequences. Much of Tasmania's rugged landscape is formed of Jurassic dolerite which presently extends over half of the area of Tasmania. Tertiary basalt and related pyroclastic rocks are found across much of the state.
Product Type
dataset
eCat Id
63695
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- GIS DatasetRegional
- ( Theme )
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- geology
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- AU-TAS
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
Publication Date
2005-01-01T00:00:00
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irregular
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geoscientificInformation
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The 1:1 million scale Geology of Tasmania dataset is generalised from the 1:500 000 scale 'Geology of Tasmania' map published in 1999 by the Tasmanian Geological Survey, with updated granite nomenclature from the 2005 1:500000 scale 'Tasmanian Granites and Associated Mineralisation' map from Mineral Resources Tasmania.
Parent Information
Extents
[-44.0, -39.0, 143.0, 149.0]
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