Stromatoporoids, corals and cyanophyceans (Renalcis and stromatolites) as main reef builders.

Macroborings evident in stromatoporoids of Geikie Gorge (fig. 129 in James, 1983).

Collection sums up data from whole Canning basin.
Diversity value includes 'algae', stromatoporoids, and colonial coral (solitary rugosans excluded)