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Valles Marineris

American  
[val-uhs-mar-uh-nair-is] / ˈvæl əsˌmær əˈnɛər ɪs /

noun

Astronomy.
  1. a canyon on Mars, 3,100 miles (5,000 km) in length, named after the Mariner spacecraft.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

To the east was mammoth Valles Marineris, a rift valley that resembles Arizona’s Grand Canyon, only nine times longer.

From National Geographic

According to NASA, the Aureum Chaos is a "229-mile wide area in the eastern part of Valles Marineris."

From Fox News

Perhaps places of great natural splendor or scientific interest, such as the Red Planet’s gigantic Valles Marineris canyon, would always remain off-limits.

From Scientific American

From there, they looked at 3 specific craters and streaks in the Valles Marineris complex and found a correlation between the RSL and faults, according to Space.com.

From Fox News

The box at that moment contained two pairs of earrings, a necklace and a plastic trinket that generated a hologram of the Valles Marineris canyons when you pushed a button on the top.

From Nature