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ve bed of basalt rests on the Archean. Erosion cut across the entire Algonkian (t''» = Unkar) series and 

 Dof Cambrian is between Archean (;' = \'ishnu) series on the left side of plate on line (Arc), and between 



nade by Walcott during winter of 1881-1882 came down over Tonto terrace and Algonkian cliffs to the 



