Gordon Downs 1:250 000 geology, second edition

Maintenance and Update Frequency: notPlanned | Statement: Geological theme generated from field observations (1990-1994) and interpretation using aerial photographs (1:25 000 colour). Topographic themes have been provided by AUSLIG with agreement that public release of any topographic data by Geoscience Australia will be in non digital form only. Some amendments to the topographic data have been made by the authors. Lineage of topographic data, prior to receipt from AUSLIG, is uncertain. Maps were compiled from unrectified photo overlays onto topographic bases supplied by AUSLIG (see notes on topographic data above). Drainage and, where necessary, other topographic features (eg fence lines) were used for spatial control of the geological data. Compilations were digitally captured either by hand or automatically by scanning and vectorising procedures. Point data with database origins have been located largely by non-differential GPS. Some detail may have been generalised, repositioned, or omitted from the primary data for cartographic purposes. | Mapping of geology on Gordon Downs SE 5210 1:250 000 map sheet in Western Australia, undertaken 1990-1994 by D.H.Blake, R.G. Warren, AGSO; T.J. Griffin, I.M. Tyler, A.M. Thorne, GSWA, as part of the National Geoscience Mapping Accord (NGMA). Briefly, mapping consists of geological boundaries/units, faults, folds, veins, dykes, linears, trends, structural measurements, and mineral deposits.