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Paperback. Condición: Good. 1952 Roswell Geological Society (Roswell, New Mexico), 8 1/2 x 11 inches tall softcover in green printed three-hole punch cover, black cloth tape to spine, printed only on recto side of each leaf, 14 ff. plus six appendices, some folding (maps and geological section diagrams). Slight soiling, rubbing and edgewear to covers. Prior owner red name stamp to front cover and first page of book. Slight age toning to contents, heavier to supplemental maps, which also have a bit of edge-chipping. Otherwise, very good. ~C~ Scarce. [1.0P] Using the supplemental maps and diagrams, gives a guided field trip of the structure and stratigraphy of a large area west of the Pecos River embracing chiefly the foothill region of the Sacramento and Guadeloupe Mountains. The field trip is divided into two separate days, visiting the Picacho, Manning and Bluewater anticlines, and Y-O Fault the McKnight and Black Hills anticline and Dunken Dome; the Elk Anticline; near Weed and Pinon, visit the Pinon structure, traveling southward along the western escarpment of the Guadalupe Mountains, visiting Standard Oil Co. of Texas Well 1 (Scarp Unit), crossing the crest of the Guadalupes east of El Paso Gap and further east Huapache Monocline, eventually arriving at Texas Hill, an anticlinal structure then being drilled.