Accompanied by 3 plates in pocket. Plate 1 : Geologic map and section of Guadalupe Mountains area. Plate 2 : Composite lithologic log of subsurface rocks in the Seven Rivers Embayment area. Plate 3 : Graphic section of Permian rocks and stratigraphic diagram of rocks in Guadalupe Mountains
69 p. illus., maps (1 col.), diagrs., tables. 29 cm.