QUANTITATIVE PEDOLOGICAL STUDIES ON SOILS DERIVED FROM SILURIAN MUDSTONES

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Abstract
Summary: The uniformity of the parent material between and within five soil profiles representing a typical catenary sequence in upland mid‐Wales was investigated using as criteria of uniformity the constancy of the ratios Zr: Sr and quartz: illite in the silt fractions. No lithologic breaks could be detected in the soil profiles. ZrO2, TiO2, quartz, and tri‐acid residue were assessed for use as internal standards. TiO2 appeared to be mobile during pedogenesis. Of the other three standards tri‐acid residue was considered to be most suitable.