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Deformational mass transport and invasive processes in soil evolutionChannels left in soil by decayed roots and burrowing animals allow organic and inorganic precipitates and detritus to move through soil from above, to depths at which the minuteness of pores restricts further passage. Consecutive translocation-and-root-growth phases stir the soil, constituting an invasive, dilatational process which generates cumulative strains. Below the depths thus affected, mineral dissolution by descending organic acids leads to internal collapse; this softened/condensed precursor horizon is then transformed into soil via biological activity that mixes and expands the evolving residuum through root and micropore-network invasion.
Document ID
19920043471
Document Type
Reprint (Version printed in journal)
Authors
Brimhall, George H. (California, University Berkeley, United States)
Chadwick, Oliver A. (JPL Pasadena, CA, United States)
Lewis, Chris J. (California, University Berkeley, United States)
Compston, William (NASA Headquarters Washington, DC United States)
Williams, Ian S. (Australian National University Canberra, Australia)
Danti, Kathy J. (NASA Headquarters Washington, DC United States)
Dietrich, William E. (NASA Headquarters Washington, DC United States)
Power, Mary E. (California, University Berkeley, United States)
Hendricks, David (Arizona, University Tucson, United States)
Bratt, James (BHP-Utah International Metals San Francisco, CA, United States)
Date Acquired
August 15, 2013
Publication Date
February 7, 1992
Publication Information
Publication: Science
Volume: 255
ISSN: 0036-8075
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF EAR-90-18747
CONTRACT_GRANT: NSF EAR-84-16790
CONTRACT_GRANT: NSF EAR-88-04136
Distribution Limits
Public
Copyright
Other