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Vernadsky-Brown Microsymposium 45
The Evolution of Climate and Weathering on Mars
March 10-11, 2007
Lunar and Planetary Institute, 3600 Bay Area Boulevard, Houston, Texas 77058

Final Program

Saturday Afternoon, March 10, 2007
1:00 PM

1. The Geological Record of Climate Change

Nathan Bridges: The preserved wind record on Mars and insights on climate change. (20')

Conway Leovy: Was Mars' climate warm and wet in the Late Noachian? An alternative hypothesis. (20')

Caleb Fassett: Age constraints on martian valley networks from buffered crater counting. (10')

1:50 PM

Ice and Glacial Processes
Wendy Calvin: Seasonal variation in the northern residual ice caps and its implication for the climate record of the current ice cap. (15')

Jim Head: Amazonian mid-latitude glaciation: A synthesis. (15')

Ernst Hauber: Former lobate debris aprons as climate indicators on Mars. (15')

David Shean: Tropical mountain glaciers and late-stage glaciation at Arsia Mons. (15')

Bernard Foing: Pavonis Mons fan shape deposit: HRSC analysis and preliminary model. (15')

Dennis Reiss: Deposition and degradation of a volatile-rich layer in Utopia Planitia, Mars. (15')

3:20 PM

Recent Gullies on Mars and Insights from Terrestrial Analogs
James Dickson: Recent gully activity on Mars: A summary of the Malin et al. Science paper and the geological context of the examples. (15')

Gareth Morgan: Insights into recent gully activity on Mars from Antarctic Dry Valley analogs. (15')

3:50 PM

2. Insights into Mars Climate from Mineralogy/Chemistry

John Bridges: Insights into climatic conditions (e.g. pCO2, duration of liquid water) from secondary minerals in SNC meteorites. (15')

Horton Newsom: Geochemistry of martian soil and bedrock in mantled and less mantled terrains with gamma ray data from Mars Odyssey. (15')

Sasha Basilevsky: Differential mobility of uranium and thorium in aqueous solutions as potential indicators of past geochemical environments on Mars.  (10')

Michael Wyatt: Constraints on mineral-phase abundances and compositions in the low-albedo northern plains of Mars using TES, OMEGA, and laboratory spectral data. (15')

Jack Mustard: Dating phyllosilicate alteration in Nili Fossae with mineralogy from CRISM and high-resolution stratigraphy from HiRISE. (15')

5:00 PM

3. Climate History and Atmospheric Evolution

Steve Nelli: Simulated water ice deposition in the equatorial regions of Mars. (15')

Joel Levine: The sulfur budget of early Mars: Surface sulfates and missing carbonates. (15')

Misha Kreslavsky: Sulfur species from volcanic outgassing on Mars: Potential signatures in geomorphology. (15')

Stephen Wood: A mechanism for Mars subsurface warming at low obliquity and its effects on the state and distribution of volatiles. (15')

6:30 PM

Posters and Reception

James Dickson: Nature and evolution of lobate debris aprons and their relationship to lineated valley fill and glacial systems along the dichotomy boundary.

Bethany Ehlmann: New phyllosilicate mineral signatures from west of Nili Fossae, Mars, through combined OMEGA-CRISM analysis.

Caleb Fassett: Gullies with changing appearance on Mars: Regional characteristics and geological setting.

James Head: Recent gully activity on Mars: Clues from late-stage water flow in gully systems and channels in the Antarctic Dry Valleys.

Joern Helbert: A global physical and morphological survey of candidate ice-rich environments and deposits on Mars.

Seth Kadish: The age and morphology of the Ascraeus Mons fan-shaped deposit.

Doug Kowalewski: Modeling vapor diffusion in sublimation tills of the Antractic Dry Valleys: Implications for the preservation of near-surface ice on Mars. 

Misha Kreslavsky: Unusual glacial-like features in the high-arctic of Mars.

Joe Levy: Lineated valley fill and lobate debris apron stratigraphy in Nilosyrtis Mensae: Evidence for multi-stage glacial activity.

Dave Marchant: Dating the world's oldest debris-covered glacier: Implications for interpreting viscous-flow features on Mars.

Gareth Morgan: Mars gully analogs in the Antarctic Dry Valleys: Geological setting and processes.

Nageswara Rao: Salt formation by progressive evaporation of brine waters filling the Endurance crater at Merdiani.

Leah Roach: Sulfate identification in East Candor, Valles Marineris with CRISM visible-infrared spectra.

Michael Velbel: Evidence of weathering on Mars from Mars meteorites and comparison with terrestrial analogs.

James Wray: HiRISE-based morphology and stratigraphy of phyllosilicate-rich outcrops in Mawrth Vallis and beyond.

Sunday Morning, March 11, 2007
8:00 AM
(Please not that Daylight Saving Time becomes effective Saturday night, so remember to set your clocks ahead one hour in order to arrive on time Sunday morning.)

4. Mars Climate Evolution: New Data, Synthesis, and Outstanding Issues

1. Alan Howard: Hydrology and drainage evolution on early Mars. (30')

2. Dan Schrag: An SO2 climate feedback on early Mars. (30')

3. Bill Hartmann: Implications of the discovery of craters formed on Mars in the last 7 years for climate models. (30')

4. Francois Forget: Glaciers and ice caps: New results from Global Climate Model simulations with varying obliquities. (30')

5. James Fastook: Tharsis Montes ice sheet models at high obliquity driven by GCM results. (30')

6. Lionel Wilson: Dispersal of tephra in explosive eruptions on Mars and implications for climate change. (30')

7. Jean-Pierre Bibring: The mineralogical/geological/climatic history of Mars from Mars Express OMEGA data. (30')

8. Scott Murchie: New insights into surface mineralogy and climate-related deposits from MRO CRISM. (30')

9. Jim Head and Sasha Baslilevsky: Closing remarks.

12:00 PM: Adjourn


Microsymposium 45 Co-convenors: Alexander Basilevsky, Jack Mustard, Michael Wyatt, Francois Forget, James Head, Jean-Pierre Bibring, Mikhail Kreslavsky and David Marchant.

E-mail your interest in attending to James_Head@brown.edu