Types of Structures in Southern Saskatchewan
Nontectonic structures in Saskatchewan comprise gravity, chemical, glacial and reef structures. Gravity structures are those due to slumping, unloading, caving, and features associated with unconformities such as compaction structures. Chemical structures include salt solution phenomena. Tectonic structures, such as folds, faults, and jointing, can be observed in Southern Saskatchewan. Faulting is indicated in the Avonlea, North Fortal, and Woodpile Coulee areas. Tectonic folds are found at Wood Mountain and Elbow. Jointing is common in several bedrock areas. There is some evidence that both tectonic and nontectonic structures are in some places expressed on the present topographic surface through thousands of feet of sediment, despite the presence of a glacial mantle. The study reveals that the origin of many structures is but little understood. Further research on some fundamental geological problems such as the magnitude of original dips, compaction, and salt solution is called for.