An early Holocene paleosol was found beneath Mazama Ash (ca. 6600 BP) near Priddis, Alberta. The paleosol pedon has strong textural and morphological differentiation, with an eluvial surface horizon, thick prismatic transitional horizon, and a Btb horizon containing both illuvial clay and organic matter. A Solonetz to Solod genetic sequence is inferred, probably related to changes in groundwater regime caused by stream entrenchment.

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