pedogenesis

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pedogenesis

[¦ped·ō′jen·ə·səs]
(geology)
References in periodicals archive ?
These calcretes are classified Pedogenic, non-pedogenic valley calcretes, soft calcrete, hard calcrete, nodular calcrete, honey comb calcrete, sandy mix calcrete, kankar, caliche, gypcretes, halcretes, silcretes and ferrocretes.
The Lake Wyara site 4 profile had an apparently well developed bleached A2 horizon, suggesting a long period of pedogenic development, given the arid environment, or stratified deposition of different-coloured materials.
During the collection of bed materials from the Ohio control ditch, gleyed surfaces were observed, indicating pedogenic loss of Fe from these bed materials.
The only difference is fragipans form as a result of pedogenesis; whereas, C horizons have been minimally impacted by pedogenic processes.
Specific pedogenic processes of litter formation operate in the forest.
During the dry season most ponds dried out, lakes had low water levels, alluvial and palustrine plains were subaerially exposed and dominated by pedogenic processes, and ephemeral channels remained inactive.
The dense clay matrix of subsoil is a consequence of pedogenic processes that have transported and packed clay crystals including eluviation and shrink-swell forces due to dry-wet conditions (Mullins and Panayiotopoulos 1984).
Pedogenic surfaces/calcareous nodules generally associated with overbank fines occur at seven horizons in the formation.
The presence of fresh water fish, plant debris, and thin pedogenic carbonate layers suggests that the fine-grained beds were deposited in a lacustrine environment; however, the presence of thin horizons with glauconite grains, marine-affinity bivalves, arenaceous foraminifera, and one specimen of a trilobite (Weir 2002; Tibert and Scott 1999) suggest a distal marine influence (Martel and Gibling 1996; Ryan 1998; Tibert and Scott 1999).
Tithionite-extractable (total pedogenic nonsiliceous) iron, oxalate-extractable amorphous iron, aluminium, and silica were measured after Coffin and Tamm, respectively; iron activity was calculated after Schwertmann (van Ranst et al.
The isotopic values of the pedogenic calcites yield positive linear covariant trends (PLCTs) in [delta][d.
Model of a rising nitrogen profile in Nile valley alluvium, and its agronomic and pedogenic implications.