Publication Date

7-1979

Publisher

Department of Agriculture, Western Australia

City

Perth

Abstract

WESTERN AUSTRALIA

Precambrian rocks occupy 1.5 million kn2 or roughly 60% of the total land area of the state, to form one of the most extensive and varied precambrian regions of the world. The oldest rocks are the comparatively little altered sediments and volcanics of the Pilbara Diock whose age must exceed that of the 3 000 million year old granites which intrude then

Western Australia is divisable into two broad geological types. The great plateau or Western or Archean Shield and coastal and inland basins.

The Western Shield is the largest area of Archean (Archeozoic era) rocks in Australia, The earliest recorded event (2700 million years) ie widespread extrusion and intrusion of igneous rocks, accompanied by deposition of sediments on a platforn, shelf or shallow basin - like surface.

Number of Pages

5

Keywords

Agriculture, Geology, Soils, Western Australia

Disciplines

Agricultural Science | Geology | Natural Resources Management and Policy | Soil Science

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