Identifying Ancient Glacial Features in The Circum-Argyre Region, Mars, Using HiRISE, CTX, and MOC Imagery Alexander Prescott Mentor: Victor R. Baker Department.

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Presentation transcript:

Identifying Ancient Glacial Features in The Circum-Argyre Region, Mars, Using HiRISE, CTX, and MOC Imagery Alexander Prescott Mentor: Victor R. Baker Department of Environmental Hydrology and Water Resources April 12, 2014 Arizona Space Grant Consortium Statewide Symposium, Tucson, AZ

Presentation Outline Guiding Question Abbreviations History Methods Images Conclusions and Further Work

Question What geomorphic evidence for wet-based glacial modification of the Southern Argyre crater rim can be identified using new high-resolution imagery from the CTX, HiRISE, and MOC missions? Some abbreviations: CTX: Context Camera on the Mars Reconnaissance Orbiter, developed and operated by Malin Space Science Systems HiRISE: High Resolution Imaging Science Experiment on the Mars Reconnaissance Orbiter, developed and operated by the Lunar Planetary Laboratory at the UA MOC: Mars Orbital Camera on NASA’s Mars Global Surveyor spacecraft developed and operated by Malin Space Science Systems JMARS: Java Mission-planning and Analysis for Remote Sensing – GIS from ASU’s Mars Space Flight Facility HiView: Application developed by the Lunar Planetary Laboratory at the UA for viewing and analyzing HiRISE imagery

Research History Several authors over the past 25 years (e.g. Banks et al. 2008, 2009; Kargel and Strom 1992; Heisinger and Head 2002; among others) have posited a history of glacial modification in and around Argyre crater Evidence includes: Large U-shaped valleys Peaks sculpted into arêtes, cirques and horns Eskers (positive relief deposits from subglacial streams) Moraines Streamlined features on hillslopes

Research Methods Over 300 images from CTX, HiRISE, and MOC missions were interpreted, especially (but not exclusively) those images taken since 2007 JMARS (Arizona State University) was used to locate and view images HiVIEW (Lunar Planetary Lab, UA) was used to further analyze HiRISE images The images presented here contain features representative of what exists across this regional landscape

40 S 60 S 300 E280 E320 E340 E 50 S Region of Study Mars Orbital Laser Altimeter (MOLA) Composite

CTX Images: Left: Composite of B12_014154_1247_XI_55S059W, G16_024492_1237_XN_56S058W, G12_022725_1237_XN_56S058W, B11_014088_1230_XN_57S057W. Right: B11_014088_1230_XN_57S057W Imagery

A A’ A Elevation Data from Mars Orbiter Laser Altimeter (MOLA) Precision Experiment Data Records (PEDR), Orbit with overlaid CTX images G12_022725_1237_XN_56S058W and B11_014088_1230_XN_57S057W

Sunlight direction Esker Candidates CTX Image: Medial Moraine Candidate Streamlined Formations Streamlined formations

MOLA Elevation Data with overlaid CTX image P14_006479_1246_XN_55S029W

MOLA Elevation Data with overlaid CTX image P14_006479_1246_XN_55S029W MOLA PEDR Orbits 11786, 11742, 11459, Accessed through the PDS Geosciences Node Mars Orbital Data Explorer, Washington University, St. Louis A A’ A

50X vertically exaggerated MOLA Elevation Data with overlaid CTX image P14_006479_1246_XN_55S029W

Conclusionsand Future Work New imagery reveals geomorphic evidence consistent with the ancient glacial modification hypothesis Wet-based glaciation? If so, could be indicative of paleoclimatic conditions conducive to the existence of water on the Martian surface As additional HiRISE imagery becomes available, there are many more areas of interest to study at higher resolution

Thank you! Special thanks to my mentor, Victor R. Baker, for accepting me as an intern and introducing me to this field; to Jeffrey S. Kargel, for teaching basic glacial physics, and for assistance in image interpretation; to Susan S. Brew and the entire UA/NASA Space Grant team – being accepted as an intern has been a true honor!