HR: 0800h
AN: P21A-0219    [Abstracts]
TI: Geomorphic and Spectral Mapping of Meridiani Planum Eastern Etched Terrain
AU: * Griffes, J L
EM: jgriffes@wustl.edu
AF: Washington University, Dept. of Earth and Planetary Sciences, Campus Box 1169, One Brookings Drive, St. Louis, MO 63130 United States
AU: Arvidson, R E
EM: arvidson@wunder.wustl.edu
AF: Washington University, Dept. of Earth and Planetary Sciences, Campus Box 1169, One Brookings Drive, St. Louis, MO 63130 United States
AU: Bibring, J
AF: Institut d'Astrophysique Spatiale, Universite' Paris-Sud, Orsay Cedex, 91405 France
AU: Poulet, F
AF: Institut d'Astrophysique Spatiale, Universite' Paris-Sud, Orsay Cedex, 91405 France
AB: Mars Orbiter Camera (MOC), Mars Orbiter Laser Altimeter (MOLA), Thermal Emission Imaging System (THEMIS), and Mars Express (OMEGA) data were compiled and coregistered for analysis of exposures of etched terrain materials in the eastern portion of Meridiani Planum (latitude: -$2.5\deg$ to $5\deg$N, longitude: $0\deg$ to $8\deg$E). The etched terrain in this region is a useful analog to the terrain underlying the hematite-bearing deposits at the Opportunity landing site. Etched materials in the study area are exposed in a NE-SW trending basin approximately 400 meters deep, 185 kilometers wide, and 315 kilometers long. We have mapped a stack (200 meters thick) of layered deposits which unconformably overlie the Noachian dissected cratered terrain. The surfaces range morphologically from smooth plains, patterned ground, and plains cut by interconnected ridges. Further, the units have distinct spectral signatures in OMEGA hyperspectral data (0.35 to 5.1 $\mu$m) acquired on orbit 485. Detailed morphologic and mineralogic maps for the eastern etched terrain will be presented and discussed.
DE: 5464 Remote sensing
DE: 6225 Mars
SC: Planetary Sciences [P]
MN: 2004 AGU Fall Meeting