Geological Regions of Australia

﻿ Abstract This dataset is a classification of the Australian continent into 2-dimensional surface regions. A geological region is a relatively large geographical area with a cohesive, albeit in some cases complex, geological assemblage (Bain and Draper 1997, AGSO Bulletin 240); significantly different in overall geology from the adjoining regions, and differs from geological province in that it does not include depth or time dimensions. Currency Date modified: September 1998 Modification frequency: None Data extent Spatial extent North: -10° South: -44° East: 154° West: 113° Source information Geoscience Australia catalog entry: [Geological Regions of Australia, 1:5 000 000 scale] Lineage statement The original data was derived from the digital version of the 1978 BMR 1:2 500 000 Geological Map of Australia. The individual units were attributed with the contents of BMR Bulletin 181 (Palfreyman, 1984). Linework and each attribute was validated against current geoscientific knowledge and the preliminary (Geology (1:2,500,000) (National Geoscience Dataset) by Shaw, Yeates, Doutch, Palfreyman and Blake, 1998) Data dictionary ──────────────┬──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── Attribute name│Description ──────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── regname │Region name from OZROX database authority table ──────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── regno │Region number from OZROX database authority table ──────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── age_class │Broad classification of regions main age into 9 classes ──────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── main_age │Dominant age of exposed rock ──────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── aprox_area │Approximate area of region in square kilometres ──────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── landforms │Physiography of region ──────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── stratig │General description of overall stratigraphy exposed in the region igneous description of igneous rocks exposed in region ──────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── reg_meta │Regional metamorphism of rocks within the region ──────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── deformatin │An indication of deformation of rocks within the region ──────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── mindeps │Indication of mineral deposits in region ──────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── geodx_ref │GEODX database reference code of references used in region information ──────────────┴──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── Contact Geoscience Australia, [clientservices@ga.gov.au]