TY - RPRT TI - Differentiation of delta-front and barrier lithofacies of the Upper Cretaceous Pictured Cliffs Sandstone, southwest San Juan Basin, New Mexico. AU - R. M. Flores AU - Michael F. Erpenbeck PY - 1981 UR - https://pubs.usgs.gov/publication/70012065 ID - 70012065 ER -