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Dec 31, 2003
Special Report
… … The Athabasca Group in Alberta was deposited between 1730 … locus of deposition shifted from west to east in response to the … and were deposited in the more central Mirror Basin, partitioned …
Dec 31, 1959
Bulletin
… shale in the Smoky River area of Alberta, Western Canada. The … Colorado shale in other areas of Alberta and northern Montana. The … the Niobrara Formation of the Central Plains region of the United …