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56 Soils through Time: Critical Zone Studies of Processes and Their Effects

Oral Session
Joint Sessions

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Monday, 6 October 2008: 8:00 AM-12:00 PM
George R. Brown Convention Center, General Assembly Theater Hall B

Presiding:
Marjorie Schulz , David Stonestrom and Daniel Richter Jr
8:00 AM
56-1
Rock to Regolith Conversion: Producing "User-Friendly" Material for Terrestrial Ecosystems
Robert Graham
8:15 AM
56-2
Distinguishing Between Biogenic and Lithogenic Processes Controlling Mineral Nutrients In Soils
Art White, U. S. Geological Survey; Marjorie Schulz, US Geological Survey; Davison Vivit, U.S. Geological Survey
8:30 AM
56-3
The Importance of Chemical Equilibrium in Controlling Chemical Weathering Rates: Insights from Reactive Transport Modeling of Soil Chronosequences
Kate Maher, Stanford University; Carl Steefel, Lawrence Berkeley Natl. Lab.; Art White, U. S. Geological Survey; David Stonestrom, US Geological Survey
8:45 AM
56-4
Response of Root Depth to Climate - a Hydrologist's View of the Critical Zone
Andrew J. Guswa, Smith College
9:00 AM
56-5
Rhizogenic Fe Redox Cycling: A Biogeochemical Process Linking Uplands and Wetlands
Ryan L. Fimmen, Battelle - Environmental Restoration; Daniel Richter, Duke University
9:15 AM
56-6
Iron Mass Balance in a Chronosequence of Upland Soils: Surficial Accumulation Due to Biological Lifting of Mineral Iron
Marjorie Schulz, US Geological Survey; Art F. White, US Geological Survey; John Fitzpatrick, US Geological Survey; Tom Bullen, US Geological Survey
9:30 AM
56-7
The Imprint of Soil Biota Over Annual to Millennial Timescales
Marshall Wilkinson, University of Kentucky; Tim Pietsch, CSIRO
9:45 AM
Break
10:00 AM
56-8
Controls on 87Sr/86Sr of Plant- Available Ions and Soil Minerals across the Hawaiian Archipelago
Oliver Chadwick, Univ California - Santa Barbara; Louis A. Derry, Cornell University
10:15 AM
56-9
Quantitative Feedback Between the Rates of Soil Chemical Weathering and Colluvial Sediment Transport along a Hillslope Transect
Kyungsoo Yoo, University of Delaware; Simon, Marius Mudd, University of Edinburgh; Jonathan Sanderman, UC Santa Cruz; Ronald Amundson, U.C. Berkeley; Alex Blum, USGS
10:30 AM
56-10
Sedimentological, geochemical, and biological aspects of bisequal spodosols formed on Trail Ridge, south Georgia, USA
Donald Thieme, Valdosta State University
10:45 AM
56-11
Opposing Effects of Rainfall and Aerosol Washout on Soil Silicon Isotope Ratios
Carleton Bern, UC Santa Barbara; Mark Brzezinski, UC Santa Barbara; Charlotte Beucher, UC Santa Barbara; Oliver Chadwick, Univ California - Santa Barbara
11:00 AM
56-12
Organic Matter Composition and Soil Mineral Interactions across a Substrate Age Gradient in Hawai'i
Marc Kramer, UC Santa Cruz; Oliver Chadwick, Univ of California
11:15 AM
56-13
Using Rare Earth Element Signatures to Probe Cumulative Effects of Short-Term Biogeochemical Processes Over Long (0.3 – 4100 ky) Time Scales
Aaron Thompson, Univ. of Georgia; Richard R.R. Rushforth, University of Arizona; Oliver Chadwick, Univ of California; Jon Chorover, University of Arizona
11:30 AM
56-14
Albite Dissolution Kinetics Under near-Equilbrium Conditions
Alexis Offner, Rice University; Rolf S. Arvidson, Rice Univ; Andreas Luttge, Rice Univ
11:45 AM
56-15
The Relationship Between Reactivity and Topography of Crystal Surfaces
Cornelius Fischer, Rice University; Rolf S. Arvidson, Rice Univ; Li Zhang, University of Southern California; Andreas Luttge, Rice Univ
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