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Apr 20, 2020
Model
… Cretaceous–Paleogene Paskapoo, Porcupine Hills, Scollard, and Willow Creek … comprised of the Paskapoo and Porcupine Hills formations, and a …
Dec 31, 1979
Earth Sciences Note
… of the Lower Cretaceous McMurray Formation. Some of these clays can … to continue. Shales from the Porcupine Hills Formation seem best suited …