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WET MARS: OCEANS, GULLIES, and MORE 7:00 P.M Lunar and Planetary Science XXXVI (2005) sess79.pdf Thursday, March 17, 2005 POSTER SESSION II: WET MARS: OCEANS, GULLIES, AND MORE 7:00 p.m. Fitness Center Barnhart C. J. Tulaczyk S. Asphaug E. Kraal E. R. Moore J. M. Ice-Ridge PileUup and the Genesis of Martian “Shorelines” [#1560] The geomorphology of crater “shoreline” features is a key to the Martian past, yet the interpretation of surface morphology lacks the definition of a quantitative model. We model geomorphic systems that posit ice plugs as the formation mechanism. Salamunićcar G. New Insight into Valleys-Ocean Boundary on Mars Using 128 Pixels Per Degree MOLA Data: Implication for Martian Ocean and Global Climate Change [#1455] This work investigates new insight into the relationship between morphology and elevation of Martian valleys termini and hypothetical Martian ocean including their implication for global climate change using 128 pixels per degree MOLA data. Santiago D. L. Colaprete A. Haberle R. M. Sloan L. C. Asphaug E. Outflow Channels Influencing Martian Climate: Global Circulation Model Simulations with Emplaced Water [#1787] We are using the NASA Ames Mars General Circulation Model to examine the climatic consequences of the sudden burst of water from outflow channels on Mars, represented here by incrementally emplacing water on the surface. Crown D. A. Bleamaster L. F. III Mest S. C. Teneva L. T. Styles and Timing of Volatile-driven Activity in the Eastern Hellas Region of Mars [#2097] Current research integrates geologic studies of the basin floor and east rim using Viking Orbiter, Mars Global Surveyor, and Mars Odyssey datasets to provide a synthesis of the history of volatiles in the region. Rodriguez J. A. P. Sasaki S. Tanaka K. L. Skinner J. A. Jr. Dohm J. M. Miyamoto H. Fairén A. G. Kuzmin R. O. Schulze-Makuch D. Baker V. R. Outflow Channel Floor Collapse and the Formation of the Simud and Tiu Valles, Mars [#1786] We investigate the geologic history of the Simud and Tiu Valles. Based on geologic mapping and geomorphic assessment using Viking-, Mars Global Surveyor-, and Mars Odyssey-based information we discuss significant surface collapse in the region. Sato H. Kurita K. Circular Collapsed Features Related to the Chaotic Terrain Formation on Mars [#2248] we examined distribution and morphologies of the circular collapses around the Xanthe terra region, Mars. We explored a model of its formation and give suggestions how the chaotic terrains were formed and discharged a huge amount of water. Bargery A. S. Wilson L. Mitchell K. L. Modelling Catastrophic Floods on the Surface of Mars [#1961] We investigate evaporation, freezing and sublimation of water flowing on the surface of Mars. Rheological changes due to ice crystal growth in water are discussed, and we attempt to relate water volume flux and maximum run-out distance. Mitchell K. L. Leesch F. Wilson L. Uncertainties in Water Discharge Rates at the Athabasca Valles Paleochannel System, Mars [#1930] We use Darcy-Weisbach flow modelling, considering all quantifiable uncertainties, in order to recalculate the volumetric flux of the floods that formed Athabasca Valles, and find uncertainties of three to four orders of magnitude. Lunar and Planetary Science XXXVI (2005) sess79.pdf Marinangeli L. Rossi A. P. Pondrelli M. Baliva A. Di Lorenzo S. Ori G. G. Hauber E. Neukum G. HRSC Team Paleoenviromental Evolution of the Holden-Uzboi Area [#1702] A variety of younger fluvio-lacustrine environments and glacial morphologies have been recognized in the Holden-Uzboi area, suggesting variations of the water cycle trough time. Leverington D. W. Evaluation of Candidate Crater-Lake Sites on Mars [#1522] There is a direct association on Mars between candidate crater-lake sites and ridged plains that mark both the source regions and basins of accumulation of massive effusive volcanic events. Williams R. M. E. Edgett K. S. Valleys in the Martian Rock Record [#1099] Martian valley systems are part of the layered upper crust and exhibit a variety of preservation states including partial or discontinuous exposure and inverted relief. Harrison K. P. Grimm R. E. Evolution of Martian Valley Network Formation: Surface Runoff to Groundwater Discharge [#1218] The morphological differences between densely dissecting, degraded martian valley networks and sparsely dissecting, pristine networks, are proposed to result from a temporal evolution away from surface runoff erosion toward groundwater processes. Gulick V. C. Revisiting Valley Development on Martian Volcanoes Using MGS and Odyssey Data [#2345] The valley networks found on the slopes of Martian volcanoes represent an interesting subset of the Martian valley networks. Here I consider what new constraints can be applied to the formation of these valleys utilizing MGS and Odyssey data. Kereszturi A. Cross Profile and Volume Analysis of Bahram Valles on Mars [#1609] We analysed cross section profiles of Bahram Valles on Mars and the connection between its shape, the surrrounding terrain and the probable erosional processes, and estimated the volume of transported material during its formation. Heldmann J. L. Johansson H. Carlsson E. Mellon M. T. Northern Hemisphere Gullies on Mars: Analysis of Spacecraft Data and Implications for Formation Mechanisms [#1271] We test the validity of gully formation mechanisms by analyzing data from the Mars Global Surveyor and Mars Odyssey spacecrafts to uncover trends in the dimensional and physical properties of the gullies and their surrounding terrain. Dickson J. L. Head J. W. III Detection of Gullies on Central Peaks and Crater Rims on Mars: Implications for the Origin of Gullies [#1097] We present evidence in MOC narrow-angle image data for gully landforms on isolated surfaces, such as central peaks and crater rims. We use this data to argue that surface accumulation and melting of snowpacks is the likely candidate for formation. Craig J. Sears D. Albedo Study of the Depositional Fans Associated with Martian Gullies [#1198] This work is a two-part investigation of the albedo of the depositional aprons or fans associated with Martian gully features. Using Adobe Systems Photoshop 5.0 software we analyzed numerous Mars Global Surveyor MOC and Mars Odyssey THEMIS images. Lunar and Planetary Science XXXVI (2005) sess79.pdf Travis B. J. On Modeling the Seepage of Water into the Martian Subsurface [#2338] Numerical simulations of water infiltration into the Martian regolith from surface sources of water indicate that infiltration can occur rapidly and that only a partially saturated condition is likely to develop in the subsurface. Howard A. D. Moore J. M. Irwin R. P. III Craddock R. A. A Sedimentary Platform in Margaritifer Sinus, Meridiani Terra, and Arabia? [#1545] A topographic bench between –1000 m to –1700 m is postulated to be a constructional fluvial platform. Bourke M. C. Brearley A. J. Haas R. Viles H. A. The Surface Features of ‘Pristine’ Flood-transported Boulders [#2253] Surface features on basalt boulders that are unique to fluvial transport have been identified and can be used to identify similar features on planetary surfaces. Salamunićcar G. Recursive Topography Based Surface Age Computations for Mars: New Insight into Surficial Processes that Influenced Craters Distribution as a Step Toward the Formal Proof of Martian Ocean Recession, Timing and Probability [#1451] This work investigates new algorithm how to measure influence on craters distribution, providing new insight into the processes that caused this influence (probably lava flows and polar caps), the amount of resurfacing and the ocean hypothesis. Nguyen D. Romero K. Cassiani N. Rogers J. Lee J. Saribudak E. Thermal Analysis of Aqueous Features on Mars [#2036] An investigation of the relationship between sinuous, dendritic features on Mars, believed to be aqueous, and the temperature of the land’s surfaces. THEMIS IR images were compared to the known aqueous features of the Kasei Valles. Horváth A. Kereszturi A. Bérczi Sz. Sik A. Pócs T. Gesztesi A. Gánti T. Szathmáry E. Annual Change of Martian DDS-Seepages [#1128] Dark Dune Spots (DDSs) are sources of slope streaks that we explain as seepages flowing down-slope from the defrosting dark regions. This water-related interpretation gives stronger evidence for the biological model of DDS formation. Möhlmann D. T. F. The Importance of Adsorption Water in the Upper Martian Surface [#1120] There is adsorption water in and above the upper martian surface at mid- and low latitudes. This “unfrozen” adsorption water behaves liquid-like. Related physical, chemical and possible biological consequences are discussed. .
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