HiRISE imaging of impact megabreccia and sub-meter aqueous strata in Holden Crater, Mars

John A. Grant, Rossman P. Irwin, John P. Grotzinger, Ralph E. Milliken, Livio L. Tornabene, Alfred S. McEwen, Catherine M. Weitz, Steven W. Squyres, Timothy D. Glotch, Brad J. Thomson

Research output: Contribution to journalArticle

85 Scopus citations

Abstract

High Resolution Imaging Science Experiment (HiRISE) images of Holden crater, Mars, resolve impact megabreccia unconformably overlain by sediments deposited during two Noachian-age phases of aqueous activity. A lighter-toned lower unit exhibiting phyllosilicates was deposited in a long-lived, quiescent distal alluvial or lacustrine setting. An overlying darker-toned and often blocky upper unit drapes the sequence and was emplaced during later high-magnitude flooding as an impounded Uzboi Vallis lake overtopped the crater rim. The stratigraphy provides the first geologic context for phyllosilicate deposition during persistent wet and perhaps habitable conditions on early Mars.

Original languageEnglish (US)
Pages (from-to)195-198
Number of pages4
JournalGeology
Volume36
Issue number3
DOIs
StatePublished - Mar 1 2008

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Keywords

  • Aqueous
  • Mars
  • Megabreccia
  • Stratigraphy

ASJC Scopus subject areas

  • Geology

Cite this

Grant, J. A., Irwin, R. P., Grotzinger, J. P., Milliken, R. E., Tornabene, L. L., McEwen, A. S., Weitz, C. M., Squyres, S. W., Glotch, T. D., & Thomson, B. J. (2008). HiRISE imaging of impact megabreccia and sub-meter aqueous strata in Holden Crater, Mars. Geology, 36(3), 195-198. https://doi.org/10.1130/G24340A.1