In southeastern Saskatchewan the uppermost 200 ft of Prairie Evaporite includes four groups of potash-bearing halite beds, the Esterhazy, White Bear, Belle Plaine, and Patience Lake Members. This sequence thins southward, although local thickening of members occurs where carnallite, not sylvite, is the dominant potash mineral.Some boreholes penetrate anomalous sequences where beds normally potash bearing are halitic or missing. The distribution of these anomalies suggests tectonically unstable areas less favorable for the deposition of potash salts.Major areas affected by complete salt solutioning are well defined seismically; localized areas of partial or complete salt solutioning appear fewer than farther north, but this could be a function of limited exploration of horizons below the petroliferous Mississippian.

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