had profound effects on the Devonian rocks. The tops of
the limestone ranges were planed off by “dirty” ice at the
base of the ice sheets and were extensively karstified by
the corrosive action of subglacial water under high pressures and subzero temperatures.
Bibliography
Playford, P. E., Hocking, R. M., and Cockbain, A. E., 2009.
Devonian reef complexes of the Canning Basin, Western
Australia: Geological Survey of Western Australia, Bulletin
145, 444.
Devonian Reef Complexes of the Canning Basin, Figure 6 Aerial view, looking south, toward the Classic Face at Windjana
Gorge, showing wepp-bedded, low-dipping, platform limestones of the Pillara Limestone on the right, massive reef-margin and
reefal-slope limestones in the center, and steeply dipping fore-reef limestones of the Napier Formation on the left. (From Playford
et al. [2009].)
Devonian Reef Complexes of the Canning Basin, Figure 7 Block diagram illustrating the morphology of the reef complexes and
relationships between platform, marginal slope, and basin facies and the various subfacies. (From Playford et al. [2009].)
308
DEVONIAN REEF COMPLEXES OF THE CANNING BASIN