The Murray Formation is the name given to a distinctive mudstone geologic formation studied by the Mars Science Laboratory (MSL) Curiosity at the Gale Crater, Mars.[1]
The formation is more than 300 metres (980 ft) thick[2] and is part of the Mount Sharp Group which interfingers with units of the Bradbury Group.[3] The formation is composed mostly of basaltic minerals plus clays, though an intermediate horizon contains tridymite, cristobalite, quartz and opal.[4]
The Murray formation has five named subunits, i.e. Pahrump Hills Member, Hartmann's Valley Member, Karasburg Member, Sutton Island Member, Vera Rubin Ridge Member.[2] It unconformably underlies the Stimson formation.[5]