From 1 - 10 / 2051
  • This dataset maps the geomorphic habitat environments (facies) for 88 Tasmanian coastal waterways. The classification system contains 11 easily identifiable and representative environments: Barrier/back-barrier, Bedrock, Central Basin, Channel, Coral, Flood- and Ebb-tide Delta, Fluvial (bay-head) Delta, Intertidal Flats, Rocky Reef, Saltmarsh/Saltflat, Tidal Sand Banks (and Unassigned). These types represent habitats found across all coastal systems in Australia. The majority of near pristine estuaries in Tasmania are located in the south and west of the State and on Cape Barren Island, according to the Department of Primary Industries, Water and Environment.

  • Outline map of Australia (with state borders and capital city locations)

  • Outline map of Australia (with state borders)

  • A simple blackline map of the outline of Australia, suitable to be printed at A4 or A3 size.

  • Australia has a thriving oil and gas industry with expanding infrastructure and many exploration opportunities. Geologically the country contains potential for large oil and gas discoveries with extensive sedimentary basins. Australia is also one of the world leaders in providing low cost geological data with an open Acreage Release process and competitive taxation regimes. Politically Australia is very stable with a very high standard of living and a long-standing democratic culture based on the rights of the individual and the rule of the law. There is a free market philosophy which welcomes foreign investment - Australia has no mandatory local equity requirements and has no government owned oil companies. Government facilitation of investment includes fast-tracking of approvals processes for major projects. This CD provides some basic Australia data including: Oil and Gas Resources of Australia 2003 This publication is the definitive reference on exploration, development and production of Australia's petroleum resources. It covers exploration, reserves, undiscovered resources, development, coalbed methane resources, production, crude oil and shale oil and supporting information and statistics. It includes a forecast of Australia's crude oil and condensate production up to the year 2020, and sustainability indicators for petroleum resources. Information on Australia's petroleum data availability is also included. An estimate of Australia's undiscovered oil and gas potential and a review of geological sequestration of carbon dioxide in Australia is included. Australian Research and Promotional Material Australian research includes research papers for Australia, Australia regions (Northwest Shelf and the Southern Margin) and CO2 Sequestration. Promotional materials refer to pamphlets which outline geological products available from Geoscience Australia and contacts for obtaining these products. This material is grouped by region with the research papers. Geoscience Australia Online Databases Demonstration The Geoscience Australia Petroleum Databases Demonstration is a Microsoft Powerpoint presentation containing instructions on how to use Geoscience Australia's online Petroleum Databases located at: www.ga.gov.au/oracle/apcrc/ This output represents the data which is considered open file and commercial-in-confidence. Petroleum Databases available at Geoscience Australia include: the Australian Geological Provinces Database, the Petroleum Information Management System (PIMS) GIS , the National Petroleum Wells Database and the National Geoscience GIS

  • Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Paterson_Bouguer_anomaly.nc grid is a complete Bouguer anomaly grid for the Paterson - WA Gravity survey. This gravity survey was acquired under the project No. 200560 for the geological survey of WA. The grid has a cell size of 0.0037 degrees (approximately 400m). A total of 4534 gravity stations were acquired to produce this grid.

  • Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Paterson_Complete_Bouguer.nc grid is a complete Bouguer anomaly grid for the Paterson - WA Gravity survey. This gravity survey was acquired under the project No. 200560 for the geological survey of WA. The grid has a cell size of 0.0037 degrees (approximately 400m). A total of 4534 gravity stations were acquired to produce this grid.

  • The Murray Canyons are a group of deeply-incised submarine canyons on a steep 400-km section of the continental slope off Kangaroo Island, South Australia. Some of the canyons are amongst the largest on Earth. The canyons, some 80 km long, descend from the shelf edge to abyssal plain 5200 m deep. Sprigg Canyon, the deepest and one of the largest, has walls 2 km high. The thalwegs of the larger canyons are concave in profile, steepest on the upper continental slope (15?-30?), with about 4?gradient on the mid slope, then level out on the lower slope to merge with the 1? continental rise. Between canyons, the continental slope is slightly convex to linear with a gradient of about 5?-6?. Canyon walls commonly slope at 15?-22?. The passive continental margin narrows to 65-km at the Murray Canyons and links the Bight and Otway Basins. WNW-trending Jurassic-Cretaceous rift structures control the irregular shape of the central canyons. At the western end, large box canyons 1 km deep are incised into thick sediments of the Ceduna Sub-basin. Formed by headscarp erosion, some of these canyons have coalesced by canyon capture. The upper parts of most canyons are cut into Cretaceous sediments and in some places are floored by basement rocks. Large holes, spaced about 5 km apart and up to several hundred metres deep, along the outlet channels of the larger and steeper canyons were probably gouged by turbidity currents resulting from major slope failures at the shelf edge. Quaternary turbidites were deposited on the abyssal plain more than 100 km from the foot of slope. Canyon down-cutting was episodic since the latest Cretaceous, with peak activity since the Oligocene due to strong glacioeustatic fluctations and cycles, with canyon development occurring during lowstands and early transgressions when sediment input at the shelf edge was usually highest. The timing of canyon development is linked to major unconformities within adjacent basins, with down-cutting events recorded or inferred during early Paleocene, Middle Eocene, Early Oligocene, Oligocene/Miocene transition (~24 Ma), mid Miocene (~14 Ma) and latest Miocene-Pleistocene. The early phases involved only siliciclastic sediments, while post-early Eocene canyon cutting was dominated by biogenic carbonates generated on the shelf and upper continental slope. The Murray River dumped its sediment load directly into Sprigg Canyon during extreme lowstands of the Late Pleistocene when the Lacepede Shelf was dry land.

  • The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium, uranium and thorium. The data are collected on airborne geophysical surveys conducted by Commonwealth, State & NT Governments and the private sector.

  • The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium, uranium and thorium. The data are collected on airborne geophysical surveys conducted by Commonwealth, State & NT Governments and the private sector.