Paleoproterozoic-earliest Mesoproterozoic sequences in the Mount Isa region of northern Australia preserve a 200 Myr record (1800-1600 Ma) of intracontinental rifting, culminating in crustal thinning, elevated heat flow and establishment of a North American Basin and Range-style crustal architecture in which basin evolution was linked at depth to bimodal magmatism, high temperature-low pressure metamorphism and the formation of extensional shear zones. This geological evolution and record is amenable to investigation through a combination of mine visits and outcrop geology, and is the principal purpose of this field guide. Rifting initiated in crystalline basement -1840 Ma old and produced three stacked sedimentary basins (1800-1750 Ma Leichhardt, 1730-1670 Ma Calvert and 1670-1575 Ma Isa superbasins) separated by major unconformities and in which depositional conditions progressively changed from fluviatile-lacustrine to fully marine. By 1685 Ma, a deep marine, turbidite-dominated basin existed in the east and basaltic magmas had evolved in composition from continental to oceanic tholeiites as the crust became increasingly thinned and attenuated. Except for an episode of minor deformation and basin inversion at c. 1640 Ma, sedimentation continued across the region until onset of the Isan Orogeny at 1600 Ma.

1m contours were generated for the Christmas Island urban area from the August 2011 LiDAR digital elevation model.

Tropical Cyclone (TC) Yasi crossed Queensland's Cassowary Coast during the night of 2nd and 3rd of February, 2011. The cyclone was forecast to be a severe storm with wind gusts expected to exceed the design gust wind speeds for houses set out in AS4055, BoM (2011). Following the passage of the cyclone, it was evident that significant damage to the region's building stock had occurred. Geoscience Australia (GA), together with collaborators from the National Institute of Water and Atmospheric Research, New Zealand (NIWA), Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) and Maddocks & Associates, undertook a survey of damage to the region's buildings caused by severe wind and storm surge. This paper reports on the survey.

Steep terrain affects optical satellite images through both irradiance and BRDF effects. To obtain corrected land surface reflectance and detect land surface change through time series analysis over rugged surfaces, it is necessary to remove or reduce the topographic effects. In this paper, a physical based BRDF and atmospheric correction model for both flat and sloping surfaces in conjunction with the 1-second SRTM (Shuttle Radar Topographic Mission) derived DSM product was applied to conduct BRDF, atmospheric and terrain correction. The model was applied to 8 Landsat scenes covering different seasons and terrain types in eastern Australia. Initial visual assessment showed that the algorithm removed much of the topographic effect and detected deep shadows in all 8 images. Indirect validation based on the change in correlation between the data and terrain slope showed that the correlation coefficient between the surface reflectance factor and the cosine of the incident (sun) angle reduced dramatically after the topographic correction algorithm was applied. The correlation coefficient typically reduced from 0.80 to 0.02 in areas of significant relief. The terrain corrected surface reflectance can also provide suitable input data for multi-temporal land cover classification in areas of high relief based on spectral signatures and spectral albedo, while the products based only on BRDF and atmospheric correction cannot. To ensure stability of the terrain corrected reflectance products when expert intervention in the processing workflow needs to be minimal, the paper also shows the need for additional constraints and calibration the correction algorithm. For example, to avoid overcorrection, the algorithm currently applies an angle threshold to both the BRDF model and the direct irradiance. Above all, the accuracy and effectiveness of the product is shown to depend particularly on the quality of the DSM data, its co-registration with the Landsat data and its spatial resolution.

This database allows users to search for - naturally-occurring landslides - landslides with a significant human contribution or directly triggered by humans,- flood events causing significant erosion, and - flash flood events involving mud or debris - which have been recorded by Geoscience Australia and contributing scientific organisations and returns these landslide and flood events along with their associated data. - Human-triggered landslides include events such as sand collapses caused by children digging holes or tunnels, boulders displaced by climbers, rock ledges breaking off when a person stands or sits on them, and collapses caused by excavation. Landslides are often called landslips and the terms are interchangeable. Last updated June 2018

This Oil and Gas Resources of Australia 2010 publication is the successor to Oil and Gas Resources of Australia 2009 and continues as the definitive reference on exploration, development and production of Australia's petroleum resources. The tables describe: - wells drilled - seismic surveys - petroleum discoveries - petroleum reserves - production and development, including forecasts of crude oil and condensate and a listing of offshore facilities

Fire-Note is a 6000+ circulation bulletin of the Aust. Fire and Emergency Service Australia Council (AFAC). This Fire-Note introduces GA's NEXIS (National EXposure Information System) to the fire and emergency services community.

Final report on activities in the Gawler - Eucla region of South Australia for the Palaeovalley Groundwater Project

Final report on project activities in the Wilkinkarra demonstartion site for the Palaeovalley Groundwater project

The Australian Reflectance Grid (ARG) is a new generation Earth Observation product suite from Geoscience Australia. These standard data products deliver optical surface reflectance data across the Australian landmass and its coastal fringes. This means the products are representative of the optical reflectance properties of the surface, with the variable effects of the atmosphere removed. The resulting datasets are effectively sensor agnostic and future products in this suite are intended to be readily comparable between scales. The first product in this suite is the ARG25, a medium resolution (25 m) grid based on Landsat imagery.