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

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

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008geo....36..195g&link_type=abstract

Geology, vol. 36, Issue 3, p.195-198

Mathematics

Logic

50

Scientific paper

High Resolution Imaging Science Experiment (HiRISE) images ofHolden crater, Mars, resolve impact megabreccia unconformablyoverlain by sediments deposited during two Noachian-age phasesof aqueous activity. A lighter-toned lower unit exhibiting phyllosilicateswas deposited in a long-lived, quiescent distal alluvial orlacustrine setting. An overlying darker-toned and often blockyupper unit drapes the sequence and was emplaced during laterhigh-magnitude flooding as an impounded Uzboi Vallis lake overtoppedthe crater rim. The stratigraphy provides the first geologiccontext for phyllosilicate deposition during persistent wetand perhaps habitable conditions on early Mars.

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