February 20, 2004 Pasadena, California - Only one month ago, the Mars Rover called Spirit started working inside the Gusev crater and extended its robotic arm for the first time toward that large pyramid-shaped rock, "Adirondack," to find out what it was made of.
The answer is dark volcanic basalt beneath a dusty coating of red iron dust. In fact, many rocks in the Gusev crater seem to be basalt and scientists are trying to figure out if they came from a volcanic eruption IN the crater? Or were carried by a river of water into the crater long ago? Or maybe were even blown into the crater by strong Martian winds?
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