1) Canyon on Mars
Found on
https://www.crosswordclues.com/clue/chasma
Chasma is a term used in astrogeology to refer to `a deep, elongated, steep-sided depression`. The plural is chasmata. As of January 2013, the IAU had named 118 such features in the Solar System, on Venus (63), Mars (24), Saturn`s satellites Mimas (6), Tethys (2), Dione (8) and Rhea (5), and Uranus`s satellites Ariel (7), Titania (2) and Obero...
Found on
http://en.wikipedia.org/wiki/Chasma
Another name used to describe a canyon.
Found on
http://www.seasky.org/astronomy/astronomy-glossary.html
A canyon.
Found on
http://www.solarviews.com/eng/terms.htm
A large canyon.
Found on
https://pds.jpl.nasa.gov/planets/special/glossary.htm
No exact match found.
