HiPODs: Week of 20 January 2020 

Frosted Gullies

Frosted Gullies
Gullies on Mars form during the winter, fluidized by carbon dioxide frost, so we monitor these sites for activity throughout the year.  
Dunes in Briault Crater

Dunes in Briault Crater
Active sand dunes are common on Mars, and have a variety of surface textures.  
Sandstone in West Candor Chasma

Sandstone in West Candor Chasma
Candor Chasma in central Valles Marineris is filled with light-toned layered deposits thought to be sandstones, perhaps formed in an ancient wet and potentially habitable environment.  
A Giant Gully in Kaiser Crater Dunes

A Giant Gully in Kaiser Crater Dunes
HiRISE has been monitoring this dune field since 2008, and it changes every year from gully erosion in the winter and blowing sand in the summer.