The foregoing contribution on the structure, stratigraphy, and nature of the oil and gas occurrence at and near the Cretaceous-Paleozoic unconformity is of great interest and significance to many of the older geologists in Western Canada for reasons which become apparent in reading this discussion.

Prior to the discovery at Leduc, Alberta, in 1947, less than 2,000 holes had been drilled in the Prairies of Western Canada, and it is safe to say that very few revealed anything approaching identical conditions at or near the unconformity which bevelled the Paleozoic sediments. Unfortunately, this writer’s memory fails him about the details...

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