Biological and abiological factors influencing interstitial water movements in sediments were studied in a simulated system. The porosity and permeability of the system decreased significantly during the 10 months of the experiment. The major governing processes were the production of an algal mat at the water-sediment interface, formation of biomass in interstitial spaces, diagenetic changes of buried algal material, and the formation of iron sulphide, evaporites, and gas locks in the sediments. The relevance of heteropermeability to the flow of underground fluids, as related to ore genesis, movement of non-miscible liquids, and environmental studies, and that of gas locks to cementation is discussed.

The reports whose titles and abstracts appear below have recently been issued as microfiche.

Correlations within the Proterozoic succession are complicated by repetitions of similar rock types at different stratigraphic levels, especially acid and basic volcanics, quartz sandstones, and calcareous rocks, and also by disconformities, igneous intrusions of various ages, tight to isoclinal folding, intense faulting, regional metamorphic effects, and scarcity of reliable isotopic age data. Consequently, there is plenty of scope for alternative interpretations. The interpretation proposed is that instead of equivalent sequences of cover rocks, known as the western and eastern successions, being separated by a narrow basement belt, as suggested previously for the Proterozoic Mount Isa Inlier, the oldest cover rocks in the west, those of the Haslingden Group, pre-date the eastern succession, and basic lavas (Eastern Creek Volcanics) within this group have no correlatives to the east. It is also suggested that volcanics previously regarded as part of the basement (Magna Lynn Metabasalt and Argylla Formation) are younger than most of the Haslingden Group, and that the extensive calcareous Corella Formation represents at least two quite separate units, one being younger than the Haslingden Group, and one being part of the underlying basement. These suggestions are consistent with U-Pb zircon dating carried out to date, as well as with the field evidence.

Product Specifications Coverage: Partial coverage, predominantly in northern Australia, along major transport routes, and other selected areas. About 1000 maps have been published to date. Currency: Ranges from 1968 to 2006. Coordinates: Geographical and UTM. Datum: AGD66, new edition WGS84; AHD. Projection: Universal Transverse Mercator UTM. Medium: Paper, flat copies only.

Legacy product - no abstract available

Legacy product - no abstract available

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.

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.

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.

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.