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- ...for establishing sandstone body geometry should have a depositionally flat datum (such as a [[bentonite]] bed, marine shale bed, or laterally persistent [[l38 KB (5,198 words) - 22:11, 15 January 2024
- ...atotype for the base of the highest Cambrian stage at the first appearance datum of Cordylodus andresi, Lawson Cove section, Utah, U.S.A.: Paleoworld, v. 1558 KB (8,121 words) - 16:35, 1 August 2016