Argyre Basin - Mars Express
Mars Express HRSC image of Aonia Terra. This image captures the reigon northwest of the 1800 km diameter Argyre impact basin (top right). The rugged terrain around Argyre preserves evidence of the impact's violence. The mountains are chunks of crust ejected from the crater, and the deep straight valleys are faults torn open by the force of impact. The Argyre basin has thought to have formed 3.9 billion years ago, during a period known as the Late Heavy Bombardment. This time period is defined from lunar rocks, but the similar appearance of giant Mercurian and Martian craters suggest it happened across the Solar System.
This image was taken during Mars Express' 15,361st orbit of Mars, February 13, 2016. It uses a combination of blue and green filter images taken by HRSC in addition to a simulated red image derived from the blue and green channel data.
Image Credit: ESA/DLR/FU Berlin/J. Cowart, CC BY-SA 3.0 IGO