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Valles Marineris |
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Valles Marineris [¦val·əs ‚mar·ə′ner·is]
(astronomy) A system of canyons which extends for over 3000 miles (5000 kilometers) along the equatorial region of Mars; it is over 300 miles (500 kilometers) wide in places and drops to more than 4 miles (6 kilometers) below the surrounding surface. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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