Coastal Quaternary geological maps
In 2005, the Geological Survey of NSW released high-resolution digital mapping data of the coastal Quaternary deposits of New South Wales as part of its contribution to the Comprehensive Coastal Assessment.
A series of 1:100 000 and 1:25 000 hard copy map products was produced from the digital data for nine areas of the North Coast. The double-sided show a 1:100 000 overview of the area's Quaternary geology on one side and two to four maps of key areas at 1:25 000 on the reverse side. A well illustrated set of explanatory notes accompanies the maps.
The map data represents a vast improvement on previous geological mapping in the coastal lowland areas of New South Wales due to the greater degree of differentiation of depositional units and a unique methodology that enabled the simultaneous mapping of surface and shallow sub-surface sedimentary deposits.
The Quaternary geology was combined with existing 1:250 000 bedrock mapping, and the GIS-based map product was linked to databases such as mining and quarrying activity, historical mineral sands mining, field sampling data and sediment characteristics.
Information contained in the mapping can assist with land-use planning and natural resource management issues, for example, through conversion to predictive maps of geological hazards, land-use capability, or location of extractive resources. The report Coastal Quaternary geology - north and south coast of New South Wales is included in Bulletin 34.
A series of four double-sided hard copy maps for the South Coast region are currently in production and are expected to be available by 2011.
To find out more about each map, please click on the link below or the target map sheet on the right.
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