[Astrobiology (journal)] Home to a lake around 4 billion years ago, Jezero Crater is a unique location to study the interplay between igneous processes and aqueous alteration on ancient Mars.
![(A) Summary interpolation of the extent of bedrock geologic units based on in situ mapping. The width of the mapping corridor is ∼120 m. White dots are positions occupied during the traverse for which images are available for mapping. (B) Summary of interpreted stratigraphic relationships between identified lithologic units along the Jezero crater floor traverse (A and B adapted from Crumpler et al., 2023; Fig. 19). (C) Orbital image of Jezero crater floor with the path of the Perseverance overlaid in white. (D) Inset of the crater floor campaign, with all Máaz abrasion patches shown (Guillaumes, Montpezat, Bellegarde, and Alfalfa), and the OEB (Octavia E. Butler) landing site indicated. The Guillaumes and Alfalfa abrasions are highlighted, as they are the focus of this article (altered from NASA). -- [Astrobiology (journal)]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/The-Possible-Aqueous.png?resize=1200%2C718&ssl=1)
[Astrobiology (journal)] Home to a lake around 4 billion years ago, Jezero Crater is a unique location to study the interplay between igneous processes and aqueous alteration on ancient Mars.