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

Oral Session
Joint Sessions


This will register you to attend an online streaming of this CEU session as it happens live at the Annual Meetings.

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

Marjorie Schulz , David Stonestrom and Daniel Richter Jr
8:15 AM
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
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
9:00 AM
Rhizogenic Fe Redox Cycling: A Biogeochemical Process Linking Uplands and Wetlands
Ryan L. Fimmen, Battelle - Environmental Restoration; Daniel Richter, Duke University
9:15 AM
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
The Imprint of Soil Biota Over Annual to Millennial Timescales
Marshall Wilkinson, University of Kentucky; Tim Pietsch, CSIRO
9:45 AM
10:00 AM
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
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
10:45 AM
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
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
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
Albite Dissolution Kinetics Under near-Equilbrium Conditions
Alexis Offner, Rice University; Rolf S. Arvidson, Rice Univ; Andreas Luttge, Rice Univ
11:45 AM
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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