Devonian reef complexes

The Devonian reef complexes form spectacular landscapes in the northern part of Western Australia. They are highly prospective for zinc–lead deposits, and also for petroleum where they extend into the subsurface. Several zinc–lead deposits and a small oilfield have so far been discovered in these rocks. Bulletin 145 Devonian reef complexes of the Canning Basin, Western Australia showcases these wondrous rock formations.

The Devonian reef complexes form a spectacular belt of rugged limestone ranges that extends for 350 kilometres along the northern edge of Western Australia's Canning Basin. These complexes are regarded as the world's best example of an exposed ancient barrier reef system, and have become known as the Devonian Great Barrier Reef. The rocks are prospective for both zinc–lead deposits and petroleum, and are regarded as a model for similar reefs that host prolific oilfields elsewhere in the world.

What is in the book?

Picture of cover of Bulletin 145 Devonian Reef Complexes

The book consists of:

  • 50 years’ research and fieldwork on the Devonian reef complexes condensed in one volume
  • more than 400 large-format full-colour photographs showing the spectacular geology of these reef complexes
  • more than 130 full-colour figures
  • eight maps spanning the exposed extent of the reef complexes
  • detailed descriptions and interpretations of important field localities

History

Research began on these reefs in 1956. The Geological Survey of Western Australia (GSWA) first undertook mapping in the area in 1962 when the original Bulletins were produced. Fieldwork continued and for this Bulletin’s senior author, Dr Phillip Playford, the work represents the culmination of more than 50 years of his studies in the area.

The Frasnian–Famennian unconformity
The Frasnian–Famennian unconformity near Limestone Spring in the northwestern Napier Range, showing well-bedded Nullara Limestone (Famennian back-reef subfacies) overlying crudely bedded Napier Formation (late Frasnian reefal-slope subfacies)
Silicified fossils, mainly brachiopods, in Sadler Limestone on the east side of the Emanuel Range.
Silicified fossils, mainly brachiopods, in Sadler Limestone (eastern Emanuel Range). Silicification is attributed to silica-rich fluids derived from abundant radiolarians in adjoining basin deposits of the Gogo Formation. Field of view ~15 centimetres.

How to access the book

Bulletin 145 Devonian Reef Complexes of the Canning Basin (by Phillip E Playford, Roger M Hocking, and Anthony E Cockbain) is available at a cost of $50 (including GST). To buy a hardcopy (boxed set of hard cover book with eight accompanying maps), please email bookshop@dmp.wa.gov.au You can also download a free PDF from the link below.

Devonian Reef Complexes of the Canning Basin, Western Australia