Does the Great Valley Group contain any Jurassic strata: Re-evaluation of the age and early evolution of a classic forearc basin fill

Surpless, K., Graham, S.A., Covault, J.A., and Wooden, J.L.

Does the Great Valley Group contain any Jurassic strata: Re-evaluation of the age and early evolution of a classic forearc basin fill: Geology, v. 34, p. 21-24.