Abstract
GEOLOGISTS studying plate tectonics have concentrated on both ends of the time scale—in regions of Phanerozoic or Archaean geology—so that little work has been done on Proterozoic orogenic belts. I believe that in the Musgrave Block–Amadeus Basin region of central Australia there is an example of Proterozoic plate tectonics or more specifically of a Proterozoic orogeny-plate tectonics correlation. If so this would be one of the oldest terrains to which plate tectonics concepts can be applied. Here I compare sections drawn for the Woodroffe and Ayers Rocks 1:250,000 geological maps (SA Mines Department and BMR 1967) with a modified schematic sequence for the collision of two continental blocks. The similarity, allowing for erosion to fairly deep levels, is striking (Figs 2 and 3). The location of the region and the broad structural features associated with it are shown in Fig. 1.
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