Distribution of rocks on the Gusev Plains and on Husband Hill, Mars

J. A. Grant, S. A. Wilson, Steven Ruff, M. P. Golombek, D. L. Koestler

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Abstract

The population of rocks larger than 15 cm in diameter was measured at 36 locations imaged by the Spirit rover over ∼ 4 km of the traverse across the Gusev plains and Husband Hill in Gusev crater on Mars. The rock population observed on plains surfaces is consistent with impact fragmentation of rubbly/fractured volcanics and reveals little evidence for modification by secondary processes or weathering. Interpretation of counts from Husband Hill suggest an influence by bedrock for rocks larger than 0.5 m across, but the distribution of smaller rocks is consistent with ejecta possessing contributions from pre-plains impact events. Results indicate plains surfaces experienced only tens of centimeters of eolian erosion/deposition since the Hesperian, whereas meters rather than tens of meters of erosion modified Husband Hill since the early Hesperian.

Original languageEnglish (US)
Article numberL16202
JournalGeophysical Research Letters
Volume33
Issue number16
DOIs
StatePublished - Aug 1 2006

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ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Grant, J. A., Wilson, S. A., Ruff, S., Golombek, M. P., & Koestler, D. L. (2006). Distribution of rocks on the Gusev Plains and on Husband Hill, Mars. Geophysical Research Letters, 33(16), [L16202]. https://doi.org/10.1029/2006GL026964