THE GENESIS OF A GRAY LUVISOL WITHIN THE BOREAL FOREST REGION. I. STATIC PEDOLOGY

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Abstract
An undisturbed site under forest cover near Breton, Alberta was chosen to study the characteristics of a typical Gray Luvisol. Smectite and to a lesser extent mica were dominant in the clay fraction of the Bt. This horizon contained higher levels of organic C, pyrophosphate-extractable Fe and Al and dithionite-citrate-bicarbonate-extractable Al than adjacent horizons. Lime carbonate was not found to a depth of 2.25 m. Argillans occupied more than 1% of the area of thin sections from Bt and BC horizons but were better developed and more numerous at depths of 1.5–2.25 m. Pedoturbation appears to have caused the disruption and incorporation of argillans into the soil matrix. Argillans in the upper Bt horizon were optically similar to mica and contained more K than argillans from the BC horizons. Silt grains imbedded in argillans were common throughout the solum. Key words: Genesis, Gray Luvisol, pedogenesis, static pedology, clay migration, lessivage

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