Penticton is an impact crater in the Hellas quadrangle of Mars, located at 38.35° south latitude and 263.35° west longitude.
[1] It is 8 kilometers in diameter and was named after Penticton, a city in British Columbia, Canada,[2] nearby the little town of Okanagan Falls where is located the Dominion Radio Astrophysical Observatory.
[5] Martian gullies are small, incised networks of narrow channels and their associated downslope sediment deposits, found on the planet of Mars.
[11] With more repeated observations, more and more changes have been found; since the changes occur in the winter and spring, experts are tending to believe that gullies were formed from dry ice.
Before-and-after images demonstrated the timing of this activity coincided with seasonal carbon-dioxide frost and temperatures that would not have allowed for liquid water.