The Zama area, in the Black Creek (salt) basin 200 miles NNE of Peace River, Alberta, produces from the upper reef member of the Middle Devonian Keg River Formation and the overlying Zama Member, a nonreef calcarenite in the Muskeg Formation. Producing zones are underlain by a 400-ft sequence of evaporites and basal red beds which rests on Precambrian granite. Reef limestone outlines the NE-trending Black Creek basin, but with subsequent subsidence the basin ceased to exist and the Zama area became part of the larger NW-trending Elk Point evaporite basin. Geologic history is illustrated by paleogeographic maps and diagrammatic cross sections; reservoir properties are tabulated.

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