TY - RPRT TI - Map showing structure contours on top of the Pictured Cliffs Sandstone and depths to the base of the Fruitland Formation, Chaco Canyon 30' x 60' Quadrangle, San Juan, Rio Arriba, and Sandoval counties, New Mexico AU - Nancy W. Sweatt AU - James W. Mytton PY - 1983 DO - 10.3133/coal92b UR - https://pubs.usgs.gov/publication/coal92B ID - coal92B ER -