These craters on the northern plains of Mars are located in the ejecta blankets of two much larger craters outside the view of this scene. They appear to have expanded, and if so, what is the process that caused it? These might be secondary craters from the original impacts.

ID: ESP_055100_2305
date: Saturday, 28 April 2018
altitude: 303 km (187.86 mi)

https://uahirise.org/hipod/ESP_055100_2305
NASA/JPL-Caltech/University of Arizona
#Mars #science #NASA