@misc{indiciae38ecbf7e6698,
  title = {Does the Great Valley Group contain Jurassic strata? Reevaluation of the age and early evolution of a classic forearc basin},
  author = {K.D. Surpless and S.A. Graham and J.A. Covault and J. L. Wooden},
  year = {2006},
  doi = {10.1130/g21940.1},
  url = {https://pubs.usgs.gov/publication/70030868},
  note = {Source identifier: 70030868}
}