Are dark particulates cleansing the carbon dioxide ice as they sink? This is a good place to test this hypothesis.

ID: ESP_056169_0945
date: Saturday, 21 July 2018
altitude: 247 km (153.14 mi)

https://uahirise.org/hipod/ESP_056169_0945
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA