paleosol

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paleosol

[′pāl·ē·ə‚sȯl]
(geology)
A soil horizon that formed on the surface during the geologic past, that is, an ancient soil. Also known as buried soil; fossil soil.
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Maher, "Magnetic properties of modern soils and quaternary loessic paleosols: Paleoclimatic implications," Palaeogeography, Palaeoclimatology, Palaeoecology, vol.
report that the earliest levels with lithics are directly above the oldest paleosol, are accompanied by abundant charcoal, and date to 2475-2195 BC ([17]: 171).
After describing the stratigraphic sections of the Guaduas formation in the studied area, 12 lithofacies were found: 1) Sandstone with bidirectional cross-stratification, 2) Sandstone with irregular wavy bedding, 3) Rhythmic successions of sandstones and claystones, 4) Sandstones with heterolithic bedding, 5) Claystones with Sandy lenses, 6) Claystones with thin lamination, and plant debris, and coal, 7) Claystones and siliceous limestones with paleosols, 8) Sandstones with through-cross stratification, 9) Sandstones with planar cross-stratification, 10) Sandstone with planar stratification, 11) Sandstone with climbing cross-stratification, and 12) Massive sandstones (Table 2).
Geochemical analysis of ancient soils, called paleosols, reveal an unexpected and mysterious abrupt transition from dry to wet.
Briefly, 10 major sedimentary deposits are distinguishable, containing two major paleosols and reaching 130 cm in total depth (Fig.
Reddish and greenish siliciclastic mudstone (F10) commonly displaying green mottling and carbonate nodules is interpreted as deposited in a flood plain, which underwent periodical subaerial exposure and development of paleosols (e.g.