Baltis Vallis (Venus)

Syrian word for planet Venus.

Baltis Vallis is a sinuous channel on Venus ranging from one to three kilometers wide and nearly 7,000 kilometers long, slightly longer than the Nile and the longest known channel of any kind in the solar system. It is thought that it once held a river of lava known as a lava channel. The lava must have had a very low viscosity, possibly due to a carbonatite composition. At the volcano Ol Doinyo Lengai in Tanzania, natrocarbonatite lava erupts at around 780 K (wikipedia entry)

A vallis is a valley. On Venus words for the planet Venus in various world languages (if 400 km and longer); if shorter they are named after river goddesses.