Mathematics – Logic
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgrb..11500d17l&link_type=abstract
Journal of Geophysical Research, Volume 115, Issue B6, CiteID E00D17
Mathematics
Logic
14
Planetary Sciences: Solid Surface Planets: Surface Materials And Properties, Planetary Sciences: Solid Surface Planets: Remote Sensing, Planetary Sciences: Solar System Objects: Mars
Scientific paper
Sedimentary deposits within the 280 km wide crater containing Aram Chaos (˜3°N, 339°E) have been differentially eroded by wind to expose a stratigraphic column 900-1000 m thick that unconformably overlies the chaos bedrock. A detailed stratigraphic and mineralogical description of the deposits is presented based on data from the Mars Reconnaissance Orbiter Compact Reconnaissance Imaging Spectrometer for Mars, Context Imager, and High Resolution Imaging Science Experiment. Two sedimentary units overlie the basement chaos material representing the original plains fill in Aram Crater: the first and oldest is composed of (1) a 50-75 m thick dark-toned basal unit containing ferric hydroxysulfate intercalated with monohydrated-sulfate-bearing materials, (2) a 75-100 m thick light-toned unit with monohydrated sulfates, and (3) a 175-350 m thick light-toned resistant capping unit with nanophase ferric oxides and monohydrated sulfates. After a period of wind erosion, these deposits were partially and unconformably covered by the second sedimentary unit, a 75-100 m thick, discontinuous dark-toned unit containing crystalline hematite and polyhydrated sulfate material. These sedimentary deposits were formed by evaporite deposition during at least two distinct rising groundwater episodes fed by regional-scale recharge. Later groundwater event(s) formed the polyhydrated materials, indicating that environmental conditions changed to a higher water-to-rock ratio. Wind has continued to shape the landscape after the last wetting event to produce the features and exposures observed.
Andrews-Hanna Jeffrey
Arvidson Raymond E.
Bishop Janice L.
Fernandez Remolar David
Glotch Timothy D.
No associations
LandOfFree
Stratigraphy of hydrated sulfates in the sedimentary deposits of Aram Chaos, Mars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Stratigraphy of hydrated sulfates in the sedimentary deposits of Aram Chaos, Mars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stratigraphy of hydrated sulfates in the sedimentary deposits of Aram Chaos, Mars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1578609