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| Description: The geologic time scale correlated with sedimentary rock exposed by erosion in the Grand Canyon. Transitions between layers of sedimentary rock mark great time spans in Earth’s history (not to the same scale). mya: millions of years ago. Dates are from the International Commission on Stratigraphy, 2007. Picture Stats: Views: 129 Filesize: 394.34kB Height: 784 Width: 1500 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=48580 |