https://www.nasa.gov/image-article/chasma-boreale-mars/
Chasma Boreale, Mars - NASA
Chasma Boreale, a long, flat-floored valley, cuts deep into Mars' north polar icecap. Its walls rise about 4,600 feet, or 1,400 meters, above the floor. Where...
chasma borealemarsnasa
https://spaceref.com/status-report/nasa-mars-picture-of-the-day-chasma-boreale-dunes-02-09-2005/
NASA Mars Picture of the Day: Chasma Boreale Dunes 02-09-2005 - SpaceRef
Feb 9, 2005 - Space news and reference site.
picture of the day