ISS033-E-6202

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Spacecraft nadir point: 18.1° S, 65.5° W

Photo center point: 19.3° S, 68.1° W

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Nadir to Photo Center: West

Spacecraft Altitude: 230 nautical miles (426km)
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Image Caption: Salar de Coipasa, Bolivia

Note: This caption refers to the image versions labeled "NASA's Earth Observatory web site".

The Salar de Coipasa, located in the Altiplano region of western Bolivia, covers an area of approximately 2500 square kilometers. The word "salar" describes arid closed basins in which evaporation of mineral-rich waters leads to the formation of thick, flat-laying salt deposits. Salar de Coipasa is located to the southwest of the saline Lake Poopo and northwest of the largest salt flat in the world, Salar de Uyuni. At Coipasa, a crust composed of halite--common table salt--provides the brilliant white coloration characteristic of the Altiplano salars (image left).

While the environment of Salar de Coipasa is arid, it does receive constant water from the Lauca River flowing from the north; this feeds Lake (Lago) Coipasa that fills the northern end of the basin with shallow water (image center). However, the water flow can drop off sharply during periods of drought. The waters of Lake Coipasa, and the white salt crust of the salar, also serve to highlight dark river sediments flowing into the basin along the northeastern shore. Dark volcanic rocks contrast sharply with the surrounding salt crust at image left. While the western Andes mountains contain many active volcanoes, the nearby Tata Sabaya volcano (not shown) has not been historically active.