A previous image, ESP_025954_1835 showed some striking dark downslope flows. Since this is a dark, low-dust setting, these are probably not slope streaks (which form in bright dusty areas).

This image can provide us with another look, particularly in order to detect any changes. Recurring slope lineae (RSL) are another type of dark streak seen on Martian slopes and are thought to form from flow of liquid water. Do these streaks behave like RSL? Additional images such as this one allow us to test whether these streaks grow seasonally and recur annually.

ID: ESP_039655_1835
date: 11 January 2015
altitude: 273 km

https://uahirise.org/hipod/ESP_039655_1835
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA