field trip leaders: Donald F. Reaser, Priscilla P. Nelson, Joe C. Yelderman ; 1990 GSA annual meeting field trip chairmen: Robert T. Clarke and Kent C. Nielsen
edited by Richard A. Davis, Jr., Harte Research Institute, Texas A&M University, Corpus Christi, Texas, USA, Robert H. Dott, Jr., Department of Geosciences, University of Wisconsin, Madison, Wisconsin, USA, Ian W.D. Dalziel, Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas, USA, and Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, Texas, USA