AU-TAS
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Legacy product - no abstract available
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This map shows the boundary of the security regulated port for the purpose of the Maritime Transport & Office Security Act 2003. 1 sheet (Colour) April 2009 Not for sale or public distribution Contact Manager LOSAMBA project
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No abstract available
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No abstract available
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90% coverage the four corners missing (special) 22-2/K55-1/8-1 Vertical scale: 15
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No product available. Removed from website 25/01/2019
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No abstract available
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No abstract available
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The opening of the Tasmanian Gateway between Australia and Antarctica at the Eocene-Oligocene boundary (~33.5 Ma) was a profoundly important event that affected global oceanographic circulation and climate. Ocean Drilling Program Leg 189 (in the gateway), together with other geoscience information, has increased our understanding of the tectonic and depositional history of the region from the Late Cretaceous until the present day. From the mid-Cretaceous until the latest Eocene, Australia and Antarctica faced each other across an ever-widening Australo-Australian Gulf, terminated to the east by a Tasmanian land bridge (Tasmania and South Tasman Rise [STR]). Siliciclastic sediments poured into the rifts from Antarctica, Australia and parts of the land bridge, forming deltas in a low-oxygen environment. Sedimentation kept up with subsidence, except on oceanic crust in the spreading Tasman Sea. Until the Paleocene/Eocene boundary (~55 Ma), Australia moved northwestward along a fracture west of the land bridge. Thereafter, Australia-Antarctic motion changed to N-S along the Tasman Fracture Zone west of STR, and an oceanic basin opened south of eastern STR. In the middle Eocene (~43 Ma), spreading rates increased between Australia and Antarctica, and Tasman Sea spreading ceased. By the latest Eocene, the STR had subsided until parts of it were current swept, and winnowing reduced sedimentation rates there and on ETP. Rapid and major increases in subsidence marked the final (earliest Oligocene) separation of STR and Antarctica. In the Pacific Ocean, strong currents eroded the shelves and opening straits, and a latest Eocene to early Oligocene hiatus was followed by deposition of bathyal carbonate oozes. The Indian Ocean was different. In nearby areas of Antarctica, non-marine and shelfal siliciclastic sedimentation gave way to glacigene detrital or diatomaceous sedimentation at the Eocene/Oligocene transition. Along the southern margin of mainland Australia, the siliciclastic-carbonate transition came at different times, but largely in the late Eocene and early Oligocene. The west Tasmanian margin ODP site had gradual increases in carbonate content through the Oligocene.
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At this scale 1cm on the map represents 1km on the ground. Each map covers a minimum area of 0.5 degrees longitude by 0.5 degrees latitude or about 54 kilometres by 54 kilometres. The contour interval is 20 metres. Many maps are supplemented by hill shading. These maps contain natural and constructed features including road and rail infrastructure, vegetation, hydrography, contours, localities and some administrative boundaries. Product Specifications Coverage: Australia is covered by more than 3000 x 1:100 000 scale maps, of which 1600 have been published as printed maps. Unpublished maps are available as compilations. Currency: Ranges from 1961 to 2009. Average 1997. Coordinates: Geographical and either AMG or MGA coordinates. Datum: AGD66, GDA94; AHD Projection: Universal Transverse Mercator UTM. Medium: Printed maps: Paper, flat and folded copies. Compilations: Paper or film, flat copies only.