A

David

Darling

Chryse Planitia

Chryse Planitia

Chryse Planitia is a relatively smooth, circular plain, possibly an ancient impact basin, in the north equatorial region of Mars, 1,600 kilometers (1,000 miles) across and 2.5 kilometers (1.5 miles) below the average planetary surface. It appears to have suffered water erosion in the past (see Mars, water on) and was chosen as the site of the Viking 1 landing in 1976.