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Natric Horizons on Some Erosional Landscapes in Northwestern South Dakota
Author(s) -
Johnson W. F.,
Mausbach M. J.,
Gamble E. E.,
Nelson R. E.
Publication year - 1985
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1985.03615995004900040031x
Subject(s) - soil water , horizon , geology , fault scarp , soil horizon , salt (chemistry) , sequence (biology) , hydrology (agriculture) , geochemistry , soil science , mineralogy , chemistry , paleontology , tectonics , geotechnical engineering , geometry , mathematics , biochemistry
Soils with natric horizons, associated slickspots, and soils with argillic horizons were sampled to study landscape relationships. These soils occur in microtopographic sequences that recur in spacings of 15 m or more. At two sites soils were sampled from trenches that transected the microtopographic sequence. At each site soils had a continuous argillic/natric horizon that was exposed at the surface in slickspots. Slickspots have an upslope scarp and appear to be dynamic erosion surfaces that migrate upslope. Salt content in and below the argillic horizon was highest in the slickspot and in pedons closest to the slickspot and decreased with distance outward from the slickspot. Content of soluble salt also appears to vary in the parent rock. It is suggested that lateral movement of salts and content of salt in the parent material are important in formation of the soils and that salts may be redistributed by the movement of the slickspots.