TY - RPRT TI - Reinterpretation of the boundary between the Cosumnes and Logtown Ridge Formations, Amador County, California AU - Robert V. Sharp AU - Wendell A. Duffield PY - 1973 DO - 10.1130/0016-7606(1973)84<3969:rotbbt>2.0.co;2 UR - https://pubs.usgs.gov/publication/70241586 ID - 70241586 ER -