THEMIS Image of the Day, October 22, 2018. This false-color VIS image shows a section of Kasei Valles. Kasei Valles is a huge outflow channel that drains from the higher elevations of Tharsis down into the lowlands of Chryse Planitia.
The landforms along the channel bed show evidence of giant floods — streamlined islands, scour marks, and now-dry waterfall cataracts — in ancient times. (See here for more on Kasei’s dry waterfalls.)
The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. These false color images may reveal subtle variations of the surface not easily identified in a single band image.