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Chemical denudation on a magnesian limestone hillslope, field evidence and implications for modelling
Author(s) -
Crabtree R. W.,
Trudgill S. T.
Publication year - 1985
Publication title -
earth surface processes and landforms
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.294
H-Index - 127
eISSN - 1096-9837
pISSN - 0197-9337
DOI - 10.1002/esp.3290100405
Subject(s) - denudation , geology , bedrock , geomorphology , weathering , geochemistry , soil science , tectonics , paleontology
Abstract The pattern of relative denudation at the soil‐bedrock interface over a wooded Magnesian Limestone hillslope was investigated using micro‐weight loss bedrock tablets. The resulting pattern of weight loss after emplacement for one year indicated a consistent upslope increase in solutional denudation. Results from tablets emplaced for two years confirmed this. Dye tracing and gypsum sphere weight loss results showed that water movement over the slope was by vertical percolation and not by throughflow. The pattern of solutional denudation was related to changes in soil type and associated changes in soil pH. Continued slope development by solutional denudation will ultimately lead to slope decline. Comparison with a similar study suggests that a general soil chemistry based model of hillslope solutional denudation can be proposed.