The Driftless Area of Wisconsin is a bedrock-dictated landscape that escaped direct glaciation during the Pleistocene.  The soils of the southern Driftless Area are derived from generations of loess mantling Galena Fm. dolomitic bedrock. Effects of loess are attenuated because source materials are limited and generally coarse-textured.  Present conditions (mesic-udic) favor physical and hydrochemical erosion – mineral contributions from the loess dominate the formation of soils, facilitated by dissolution of carbonate bedrock at depth.  Primarily minerals are dissolved and pedogenic phases (clay minerals and oxides) re-precipitate in strongly structured argillic horizons.  Occurring discontinuously at depth in these soils is a significant red clay stratum from 0.3 – 3 m thick (the Rountree Formation) similar to Terra Rossa described in many carbonate bedrock settings. This time-transgressive stratigraphic unit is hypothesized to be formed entirely through pedogenic accumulation of clays and oxides through weathering of multiple generations of loess.  We utilized volumetric compositions of the relatively immobile elements titanium (Ti) and zirconium (Zr) to evaluate this postulation. The dolomitic bedrock is depleted in Ti and Zr (3.22 μmol cm^-3 and 0.11μmol cm^-3, respectively) relative to loess, which contains 184.54 μmol cm^-3 Ti and 7.44 μmol cm^-3 Zr.  This strong compositional contrast between the two materials is used to show how pedogenic mineral accumulations contribute to the Rountree Fm. in these landscapes.  Eleven pedons from Iowa County in southwestern Wisconsin with silt loam to clay loam upper sola (A-Bt/2Bt), red-hued high clay and oxide-content Rountree Fm. 3Bt horizons overlying dolomite residuum (3BC/3C) were evaluated using this indexing method.  Mean estimates of dissimilarity of Ti and Zr compositions for the pedons support the hypothesis that the Rountree Fm. is an old pedogenic unit, possibly pre-Pleistocene in age, which continues to develop through accumulation of translocated constituents into dissolving carbonate bedrock.