The types of local structure and anomalies mapped during the course of exploration in Saskatchewan are classified into four groups. They are: (1) the true tectonic uplifts involving all of the sedimentary section; (2) structures involving most of the Devonian section and the overlying sediments, which are believed to be caused by leaching of the Devonian salts and collapse of the overlying sediments; (3) anomalies represented by buried Paleozoic topography, some of which do not affect the attitude of the overlying sediments, and others of which show draping over buried Paleozoic hills; and (4) structures involving the younger sediments which overlie undisturbed older sediments.

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