Biology
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3611204m&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 11, CiteID L11204
Biology
5
Mineral Physics: Optical, Infrared, And Raman Spectroscopy, Mineralogy And Petrology: Planetary Mineralogy And Petrology (5410), Hydrology: River Channels (0483, 0744), Geochemistry: Composition Of The Planets, Planetary Sciences: Astrobiology: Hydrothermal Systems And Weathering On Other Planets
Scientific paper
The western floor of the Miyamoto crater in Sinus Meridiani on Mars exhibits both geomorphic and spectral evidence for aqueous history. It contains a sinuous and narrow ridge that is interpreted to be an inverted channel and is suggestive of past fluvial activity. Phyllosilicates occur in materials that are proximal to the paleochannel, but are not detected on top the ridge. The simultaneous use of the spectroscopic data, high-resolution images, and a digital elevation model show that Fe/Mg-smectites are exposed by erosion. They are associated with polygonally-fractured bedrock which occurs on the slopes of both sides of the sinuous ridge. The observations provide direct evidence of the presence of water and possibly of multiple aqueous events throughout the area.
Lanza Nina L.
Marzo Giuseppe A.
McGuire Patrick C.
Newsom Horton E.
Ollila Ann M.
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