Observations by the Mars Science Laboratory Mast Camera (Mastcam) in Gale crater reveal
isolated outcrops of cemented pebbles (2 to 40 millimeters in diameter) and sand grains with …

Landforms representative of sedimentary processes and environments that occurred early in
martian history have been recognized in Mars Global Surveyor Mars Orbiter Camera and …

The rover Opportunity has investigated the rim of Endeavour Crater, a large ancient impact
crater on Mars. Basaltic breccias produced by the impact form the rim deposits, with …

Layered and massive outcrops on Mars, some as thick as 4 kilometers, display the
geomorphic attributes and stratigraphic relations of sedimentary rock. Repeated beds in …

Sojourner, the Mars Pathfinder rover, discovered pebbles on the surface and in rocks that
may be sedimentary—not volcanic—in origin. Surface pebbles may have been rounded by …

The Mars Exploration Rover Opportunity has investigated the landing site in Eagle crater
and the nearby plains within Meridiani Planum. The soils consist of fine-grained basaltic …

INTRODUCTION Remote observational data suggest that large bodies of standing water
existed on the surface of Mars in its early history. This would have required a much wetter …

The Perseverance rover landed in Jezero crater, Mars, to investigate ancient lake and river
deposits. We report observations of the crater floor, below the crater's sedimentary delta …

Sedimentary rocks at Eagle crater in Meridiani Planum are composed of fine-grained
siliciclastic materials derived from weathering of basaltic rocks, sulfate minerals (including …

The composition of the ancient martian crust is a key ingredient in deciphering the
environment and evolution of early Mars. We present an analysis of the composition of large …