A Paleozoic perspective of Western Australia

Paleozoic strata are preserved across about 30% of onshore Western Australia in both the coastal and interior basins. These sedimentary successions are largely unmetamorphosed and little deformed as orogenic events were subdued compared with the Precambrian. A series of Statewide paleogeographic reconstructions paired with isopach images are used to detail the Paleozoic depositional and structural history of these basins. The time slices are based on regional correlations underpinned by biostratigraphic and paleontological studies from more than 800 wells drilled in the Phanerozoic basins.

Geologist taking samples at an outcrop of Lower Ordovician limestone and shale, Prices Creek (northern Canning Basin)
Geologist taking samples at an outcrop of Lower Ordovician limestone and shale, Prices Creek (northern Canning Basin)

What is in the book?

Cover of the book
Cover of the book

The book commences with a brief explanation of the assembly of Gondwana at the end of the Proterozoic and an overview of the distribution and structure of the onshore depocentres. Four main phases of Paleozoic basin development are described: Cambrian intracratonic sag followed by three rift phases of Ordovician – Early Devonian, Middle Devonian to mid-Carboniferous, and latest Carboniferous to Permian age.

Following the Paleozoic, the main depocentres shifted offshore to the present-day northwest for most of the Mesozoic.

The book is full of colourful photos and illustrative figures. It has interesting pull-out boxes with simple explanations and many detailed maps of Western Australia.

This book is published under the banner of Western Australia unearthed, a series that progressively chronicles the geological evolution of Western Australia.

How to access the book

A Paleozoic perspective of Western Australia by Arthur J Mory is available for $33 (including GST). To buy a hardcopy, please email bookshop@dmirs.wa.gov.au Order five or more copies and get the books for a special discounted price of $22 each.

Paleogeographic map (left) paired with an isopach image (right) illustrates the period from 300 million years to 293 million years
Paleogeographic map (left) paired with an isopach image (right) illustrates the period from 300 million years to 293 million years.
Glossopteris sp. (delicate extinct seed fern) from Collie Group in the Perth Basin
Glossopteris sp. (delicate extinct seed fern) from Collie Group in the Perth Basin

A Paleozoic perspective of Western Australia