TY - RPRT TI - Pliocene uplift of the grand canyon region - time of drainage adjustment AU - E. D. McKee AU - E.H. McKee PY - 1972 DO - 10.1130/0016-7606(1972)83[1923:puotgc]2.0.co;2 UR - https://pubs.usgs.gov/publication/70207141 ID - 70207141 ER -