TY - RPRT TI - Does the Great Valley Group contain Jurassic strata? Reevaluation of the age and early evolution of a classic forearc basin AU - K.D. Surpless AU - S.A. Graham AU - J.A. Covault AU - J. L. Wooden PY - 2006 DO - 10.1130/g21940.1 UR - https://pubs.usgs.gov/publication/70030868 ID - 70030868 ER -