The Tiu Valles, as seen by HiRISE. Ridges were probably formed by running water (scale bar is 1.0 km).
They are 1,720 km (1,070 mi) long and were named after the word for "Mars" in Old English (West Germanic).
- Baker, V.R.; Carr, M.H.; Gulick, V.C.; Williams, C.R.; Marley, M.S.. "Channels and Valley Networks". in Kieffer, H.H.. Mars. Tucson, AZ: University of Arizona Press.
- Carr, M.H. (11 January 2007). "Channels, Valleys and Gullies". The Surface of Mars. Cambridge University Press. ISBN 978-0-521-87201-0.
Original source: https://en.wikipedia.org/wiki/ Tiu Valles. Read more