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Remnant of salt cone, a salt cup, on the rugged perennial rock-salt curst in the northwestern part of Salar de Pedernales. Atacama Province, Chile. Circa 1962.
Silty nitrate-bearing salar crust. Shallow nitrate workings in the southern part of Salar de Pampa Blanca. Antofagasta Province, Chile. Circa 1962. Published in U.S. Geological Survey Professional Paper 811, Figure 28-A. 1974.
Rugged perennial rock-salt crust showing delicate clinker-like texture, southeastern part of Salar de Atacama. Antofagasta Province, Chile. Circa 1962. Published in U.S. Geological Survey Professional Paper 811, Figure 22. 1974.
Silty nitrate-bearing salar crust. Shallow nitrate workings in the southern part of Salar de Pampa Blanca. Antofagasta Province, Chile. Circa 1962. Published in U.S. Geological Survey Professional Paper 811, Figure 28-A. 1974.
Criss-crossing game trails, Atacama Desert, near Vallenar. Chile. No date.
Mudflow near Laguna del Negro Francisco. Atacama Province, Chile. No date.
Samll brine pool in a thin, one to two foot rock-salt crust, eastern side of Salar de Atacama. Antofagasta Province, Chile. Circa 1962. Published in U.S. Geological Survey Professional Paper 811, Figure 35. 1974.
Close-up of curved trackway shown in upper part of photograph 7. Tarapaca Province, Chile. 1955. Published in U.S. Geological Survey Bulletin 1189, Figure 9. 1965.
Orifice of a salt solution tube about 4 inches in diameter in relatively smooth massive rock-salt curst, formed by solution of salt by rainwater and fog, northwestern part of Salar de Pedernales. Atacama Province, Chile. Circa 1962. Published in U.S. Geological Survey Professional Paper 811, Figure 40-C. 1974.
Gypseous rampart (maximum height of 4 feet) bordering saline pond at western edge of Salar de San Martin. Antofagasta Province, Chile. Circa 1962. Published in U.S. Geological Survey Professional Paper 811, Figure 33. 1974.
Tafoni (cavernous weathering of granite), Coast Range. Northern Chile. No date.
Folded Cretaceous siltstone and limestone. Quebrada de Las Penas. Atacama Province, Chile. No date.
Contact between siltstone and overlying cherty beds (Cretaceous). Quebrada Cerrillos. Atacama Province, Chile. No date.
Pre-Inca pictographs made by overturning varnished desert pavement. Salar de Pintadas, Chile. No date.
Pit about 6 feet deep in clay playa near north end of Salar de Pintados showing layers of anhydrite, the white bands in lower part of pit wall. Tarapaca Province, Chile. Circa 1962. Published in U.S. Geological Survey Professional Paper 811, Figure 19. 1974.
Variegated Jurassic beds. Quebrada Calquis. Atacama Province, Chile. No date.
Boiling spring and pool at southeastern edge of Salar de Surire. Tarapaca Province, Chile. Circa 1962. Published in U.S. Geological Survey Professional Paper 811, Figure 7. 1974.
Erosion of halite in a salt dome (by solution weathering). Salar de Atacama, Chile. No date.
Truncation of folded Cretaceous beds near Aguada Perro (truncation is by high terrace gravel). Atacama Province, Chile. No date.
Contact between siltstone and overlying cherty beds (Cretaceous). Quebrada Cerrillos. Atacama Province, Chile. No date.
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