Fluid lava flows in Gusev crater, Mars

Ronald Greeley, Bernard H. Foing, Harry Y. McSween, Gerhard Neukum, Patrick Pinet, Mirjam van Kan, Stephanie C. Werner, David Williams, Tanja E. Zegers

Research output: Contribution to journalArticlepeer-review

119 Scopus citations


Rocks on the floor of Gusev crater are basaltic in composition, as determined from measurements by the Mars Exploration Rover, Spirit. On the basis of compositional data, models of the basaltic lavas at the time of their emplacement suggest viscosities of 2.3 to 50 Pa · s (dependent on the number of phenocrysts and vesicles that were present), which would be more fluid than terrestrial tholeiiltic lavas and comparable to mare lavas on the Moon or Archean high-Mg basalts on Earth. Morphological data and crater counts derived from the High Resolution Stereo Camera on Mars Express and other orbiters suggest that the lavas flooded Gusev crater at about 3.65 b.y. and postdate older floor materials, such as putative sediments emplaced by Ma'adim Vallis.

Original languageEnglish (US)
Article numberE05008
Pages (from-to)1-6
Number of pages6
JournalJournal of Geophysical Research: Planets
Issue number5
StatePublished - May 20 2005

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Atmospheric Science
  • Astronomy and Astrophysics
  • Oceanography


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