Stratigraphy

Horizon stratigraphy is spatially diverse in the study area but illustrates repeating patterns of soil-microtopographic elements (Fig. 4a). For risers, horizon stratigraphy is commonly A, 2Bk, 3Cr, and 4R. Sometimes a mixed transitional horizon occurs between A and Bk horizons (identified as A/Bk or Bk/A) and Cr or R horizons (identified as Bk/Cr, Cr/Bk, Bk/R, or R/Bk). These are horizons that contain physical mixtures of two different genetic horizons. The A horizon is a zone of organic matter enrichment and formed in colluvium of hard ledge-former rock fragments and transported pedisediments or weathering products from upslope treads. The Bk subsoils are loci of pedogenic carbonate enrichment into weathered caliche regolith. Here, accumulation of pedogenic _______ ______ ________ _______ ____.
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