MEGAFLOOD CHANNEL. Kasei Valles is the largest and longest flood spillway on Mars. It runs more than 2,400 kilometers (1,500 miles) north across Lunae Planum before turning east and emptying into the Chryse Planitiia basin. We are looking west (upstream) from an altitude of about 150 kilometers (90 miles). In the distance, it appears that there are two separate channels, yet both are part of Kasei. The large crater on the mesa in the center is Sharonov, 100 km (62 mi) in diameter. This view has a vertical exaggeration of 2x, and a 10 MB version of the image is available. Image credit: NASA/JPL/Arizona State University, R. Luk.
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