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Spacecraft nadir point: 22.3° S, 61.1° W

Photo center point: 22.0° S, 62.5° W

Nadir to Photo Center: West

Spacecraft Altitude: 178 nautical miles (330km)
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Image Caption:
Pilcomayo Mega-cone

Mega-cones are very large land form features: in the foreground
of this mosaic lies the upper 300 kms of the world's largest
known cone, that of the Pilcomayo River. Leaving the Andes
ranges (background) the Pilcomayo flows out onto an enourmous
"cone" made of its own sediment laid down over the last several
million years with a radius of 500 km. The cone apex lies at the
point where the Pilcomayo exits the mountains -- light-colored
old courses (arrows) can be seen radiating away from the apex.
The major light-colored, fan-like feature (foreground) is a large
subcone 150 km long. A small cone can be seen top left related
to the prominent light-colored stream which exits the Andes south
of the Pilcomayo.

The Pilcomayo River acts as the boundary between Argentina (left)
and Paraguay (right). The upper part of the cone lies in Bolivia.
The three countries meet at A. (S32-88-091, 092)