Shalbatana Vallis is an ancient water-worn channel on Mars

Mars

Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...

, located in the Oxia Palus quadrangle

Oxia Palus quadrangle

The Oxia Palus quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey Astrogeology Research Program. The Oxia Palus quadrangle is also referred to as MC-11 ....

 at 7.8° north latitude and 42.1° west longitude. It is the westernmost of the southern Chryse outflow channels

Outflow channels

Outflow channels is the term used to describe extremely long, wide swathes of scoured ground on Mars, commonly containing the streamlined remnants of pre-existing topography and other linear erosive features indicating sculpting by fluids moving downslope...

. Beginning in a zone of chaotic terrain, at 0° latitude and 46° W longitude, it ends in Chryse Planitia

Chryse Planitia

Chryse Planitia is a smooth circular plain in the northern equatorial region of Mars close to the Tharsis region to the west, centered at . Chryse Planitia lies partially in the Lunae Palus quadrangle and partially in the Oxia Palus quadrangle...

.

Shalbatana Vallis contains our first definitive evidence of a Martian shoreline. This shoreline was part of an ancient lake 80 square miles (207.2 km²) in size and 1500 feet (457.2 m) deep. The study carried out with HiRISE images indicates that water formed a 30 miles (48.3 km) long canyon that opened up into a valley, deposited sediment, and created a delta. This delta and others around the basin imply the existence of a large, long-lived lake. Of special interest is evidence that the lake formed after the warm, wet period was thought to have ended. So, lakes may have been around much longer than previously thought.
It is the word for "Mars" in Akkadian.