Stratigraphic Sections of Subsurface Jurassic Rocks in the San Juan Basin, New Mexico, Colorado, Utah, and Arizona (Oil and Gas Investigations Chart)

U.S. Geological Survey, 1983. Original edition. Quarto [30 cm] Two large-format folded sheets housed in a yellow and black printed envelope. The charts are clean, and in near fine condition. The envelope has a two inch closed tear in the bottom edge. Chart OC-118.