Astrogeology Science Center


Serving the nation, the international science community, planetary scientists and the general public in the pursuit of new knowledge about our Solar System.


Glossary of Terms


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Year Published: 2021

Exposure of an early to middle Noachian valley network in three dimensions on Mars

We document a set of channels in a section of the Martian cratered highlands located between crustal massifs northeast of Hellas Planitia that are visible in cross section and planview >200 m below the surface. The morphometry and spatial distribution of the outcrops provide concrete geological evidence of a dynamic aqueous system in a...

Skinner, James A.; Fortezzo, Corey M.; Mouginis-Mark, Peter J.

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Year Published: 2020

Geologic map of Jezero crater and the Nili Planum region, Mars

The cratered highlands located northwest of Isidis Planitia have been recognized as one of the best preserved Noachian landscapes currently exposed on Mars; the area hosts a record of diverse surface processes, diagenesis, and aqueous alteration. This region has consistently been considered a high priority for landed-mission exploration and...

Sun, Vivian Z.; Stack, Kathryn M.
Sun, V.Z., and Stack, K.M., 2020, Geologic map of Jezero crater and the Nili Planum region, Mars: U.S. Geological Survey Scientific Investigations Map 3464, pamphlet 14 p., 1 sheet, scale 1:75,000,

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Year Published: 2020

Planetary cave exploration progresses

Planetary caves have been identified on the Moon and on Mars, and are likely to occur across the Solar System. They present a new frontier for planetary science, subsurface astrobiology, geology and human exploration. The fourth in a series of scientific meetings focusing on the science and exploration of planetary caves brought together 55...

Titus, Timothy N.; Phillips-Lander, C. M.; Boston, P. J.; Wynne, J. J.; Kerber, L.