23 March 2010

Ada Dinding Es pada Planet Mars

Mars as you've never seen it before: The colossal ice walls that show another side of the Red Planet


It looks like a filmmaker's apocalyptic vision of Earth following a devastating natural disaster.

But this colossal ice formation is actually a portion of the wall terraces of a huge crater on Mars.

Approximately 37 miles in diameter, a section of the Mojave Crater in the planet's Xanthe Terra region has been digitally mapped by Nasa scientists.

The result is this digital terrain model that was generated from a stereo pair of images and offers a synthesized, oblique view of a 2.5-mile portion of the crater's wall terraces.

Mojave Crater in the Xanthe Terra region of Mars

Colossal: This ice formation is a portion of the wall terraces of the Mojave Crater on Mars. It has barely suffered any erosion so offers scientists a tantalising glimpse of what a very large complex crater looks like

The sheer depth of the crater - about 1.6 miles - demonstrates that Mojave has experienced little infilling or erosion.

The result offers scientists a tantalising glimpse of what a very large complex crater looks like on Mars because it remains so fresh while most others - especially this size - have been affected by erosion, sedimentary infilling and overprinting by other geologic processes.

Such a fresh crater provides an insight into the impact process.

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