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Lunar and Planetary Science XXXII (2001) sess19.pdf Tuesday, March 13, 2001 POSTER SESSION I 7:00–9:30 p.m. UHCL Mars Channels, Lakes, and Oceans Berman D. C. Hartmann W. K. Burr D. M. Marte Vallis and the Cerberus Plains: Evidence of Young Water Flow on Mars [#1732] We examine the relationship between apparent fluvial channels and lava flows among the young lavas of the Elysium plains and Cerberus plains. A sequence of lava flows and water release appears to have occurred extending into recent geologic time. Moller S. C. Poulter K. E. Grosfils E. B. Sakimoto S. E. H. Mendelson C. V. Bleacher J. E. Morphology of the Marte Valles Channel System, Mars [#1382] The Marte Valles channel system near Orcus Patera, Mars is reassessed with MOLA topography. We find evidence of ponding, increasing cross-sectional area downstream suggesting multiple sources, and possible intertwined volcanism and water flow. Nelson D. M. Farmer J. D. Greeley R. Hydrologic History of South Elysium Basin-North Terra Cimmeria Area, Mars [#2069] Geologic mapping of the Terra Cimmeria outflow channels suggests a prolonged hydrologic history, sustained by tectonic and volcanic interactions with the ground water-crysophere system. Kereszturi Á. Analysis of the Meanders of Some Runoff Channels on Mars [#1177] Morphometrical and morphological analysis of runoff channels on Mars. Results: possible connection between the meanders’ parameters and the channel width, which may be the base of a future method for paleodischarge estimations. Rosenshein E. B. Greeley R. Arrowsmith J. R. Application of Terrestrial Geomorphic Threshold Theory to the Analysis of Small Channels on Mars [#1921] New terrestrial work on the geomorphic thresholds for channel initiation use the drainage area above a channel head vs. the slope at the channel head to delineate surface process types. This method has been used to characterize martian landscapes. Craddock R. A. Franz G. A. Cook A. C. Howard A. D. High Resolution Morphometric Studies of Martian Valley Networks in the Iapygia Region [#1833] We present detailed information on valley network morphometry in the Iapygia region based on high resolution digital elevation models produced by combining MOLA data with Viking stereophotogrammetric data. Leone G. Wilson L. Orofino V. Fonti S. Gorgonum Chaos: Are the Seepage-Runoff Features Really Recent? [#1649] We discuss the alleged runoff features in Gorgonum Chaos, Mars, which have been suggested as recent features. We conclude that they are more likely of Amazonian age. Harrison K. P. Grimm R. E. Martian Hydrothermal Systems: Relationship Between Magnetic Anomalies and Valley Networks [#1441] Hydrothermal circulation may explain the spatial correlation between concentrated magnetic anomalies and valley networks. Numerical models show that hydrothermal discharge spans a comparable range as the inferred discharge from valley networks. Lunar and Planetary Science XXXII (2001) sess19.pdf Grant J. A. Valley Evolution in Margaritifer Sinus, Mars [#1226] Valley morphometry suggests formation via localized ground-water discharge enabled by surface-fed recharge. Precipitation was largely relegated to subsurface entry by high surface-infiltration capacities. Discharge occurred at exposed aquitards. Bourke M. C. Zimbelman J. R. Finnegan D. Banerdt B. The Modification of Mars Fluvial Surfaces [#2109] The identification of fluvial deposits on Mars is impaired by modifying geological processes. An analysis of surface patterns of superimposed dunes and channels in paleoflood environments in Washington State and Australia can yield information on buried surfaces. Irwin R. P. III Howard A. D. Cratering and Fluvial Erosion in Noachian Terra Cimmeria, Mars [#1377] The disruption of catchments by impact craters, divide breaching, valley morphology, and the source of water are discussed for part of the Terra Cimmeria, Mars. Large, integrated catchments are identified that pre-date degraded Noachian craters. Cabrol N. A. Grin E. A. Wynn-Williams D. D. Prolonged Ponding Episode in C-Newton Crater in Recent Geological Times on Mars [#1255] We present the morphological evidence that supports the existence of a lake in a recent past in C-Newton crater. We assess the astrobiological potential of this environment. Carter B. L. Frey H. Sakimoto S. E. H. Roark J. Constraints on Gusev Basin Infill from the Mars Orbiter Laser Altimeter (MOLA) Topography [#2042] MOLA topography provides volume estimates for Gusev crater based on higher resolution. Revisiting work previously done by Grin and Cabrol (1997), we find a substantial increase in original sedimentation estimates. Rakonczai J. Hargitai H. Bérczi Sz. Comparisons of the Ancient Meandering Riverbeds in the Chryse Region, Mars, and on the Tisza Flooded Basin in the Carpathian Basin, Earth [#1507] Hydrogeomorphologic comparisons of meandering martian riverbeds, Chryse Region, and recent/ancient riverbeds of Tisza, Carpathian Basin imply: (1) presence of flowing water; (2) by left-over valleys a longer history of flowings on Mars. Mason D. Caddy B. Melchior R. Annexstad J. The Beaches of Lake Agassiz, an Analog for Martian Shorelines [#1397] Similarities between glacial Lake Agassiz shorelines and martian analogs are noted. Reasons for differences are suggested. Matsui T. Takamiya I. Imamura F. Tajika E. Tsunami Generation and Propagation in Possible Ancient Ocean on Mars [#1716] We study generation and propagation of impact-induced tsunami on Mars by using numerical models. We find that maximum tsunami height is more than 60 m at some coastal regions, which suggests we may find some evidence of tsunami on Mars..
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