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MICROFABRIC EVIDENCE FOR PODZOLIC SOIL INVERSION BY SOLIFLUCTION PROCESSES
Author(s) -
ELLIOTT GRAHAM
Publication year - 1996
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/(sici)1096-9837(199605)21:5<467::aid-esp665>3.0.co;2-v
Subject(s) - solifluction , geology , silt , geomorphology , podzol , inversion (geology) , stratigraphy , soil science , glacial period , soil water , paleontology , structural basin , tectonics
The inverted stratigraphy of a turf‐banked solifluction lobe formed in a podzol in northern Norway is presented. Additional evidence for soil inversion takes the form of an inverted micromorphological profile. Encircling silt cappings, and related microstructures, are described from thin sections. This microstructure is created by grain rotation during the spring thaw of sediment when excess pore water pressures promote viscous flow. Melting ice lenses release silt which is then trapped on all sides of detrital grains. The presence of these microstructures in the near‐surface and base of the solifluction lobe, but not at mid‐depths, supports the notion of an inverted stratigraphy.