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Equatorial rain forest lateritic mantles; a geomembrane filter

Fabrice Colin, George H. Brimhall, Daniel B. Nahon, Christopher J. Lewis, Alain Baronnet and Kathy J. Danti
Equatorial rain forest lateritic mantles; a geomembrane filter
Geology (Boulder) (June 1992) 20 (6): 523-526


The superimposed weathering layers in equatorial rain forest lateritic mantles from Gabon, Africa, function as interactive compartments forming a dynamic semipermeable geomembrane filter. Selectivity of the filter is controlled by a progressive downward disappearance of connected macropore pathways created by bioturbation and dissolution. The natural balance of root activity, translocation, dissolution, deformation, and pore evolution leads to the development of porous and permeable, mature, open geochemical weathering systems at the expense of the lithosphere. These conclusions can be useful in modeling the fate of lateritic soils, which cover one-third of the emerged area of the world and which are economically important both as metal deposits and agricultural soils.

ISSN: 0091-7613
EISSN: 1943-2682
Serial Title: Geology (Boulder)
Serial Volume: 20
Serial Issue: 6
Title: Equatorial rain forest lateritic mantles; a geomembrane filter
Affiliation: Univ. Aix-Marseille III, Inst. Fr. Rech. Sci. Dev. et Coop., Marseilles, France
Pages: 523-526
Published: 199206
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 13
Accession Number: 1992-034401
Categories: GeomorphologySoils
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
S04°00'00" - N02°30'00", E08°30'00" - E14°30'00"
Secondary Affiliation: Univ. Calif. at Berkeley, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1992
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