Depth of leaching in relation to carbonate content of till in central New York State

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Abstract
Depth of leaching varies inversely with calcium carbonate content of till in the N-S transect in the uplands of the Finger Lakes region of central New York. Variability of slope and of till texture and density were limited by careful selection of sampling sites to minimize factors which might mask the relationship of carbonate content to depth of leaching. The transect is marked by progressive southward decrease in carbonate content and increase in depth of leaching. The most striking change in carbonate content, depth of leaching, and soil profile characteristics occurs in a narrow transition zone which lacks topographic features indicative of a significant glacial stillstand. Instead, this pattern of change is apparently related to distance from outcrops of calcareous rocks and to currents of major ice movement. Differences in age of the drift within the range of the transect are not great enough to have an effect on the depth of leaching comparable to the effect of carbonate content. For a distance on both sides of the Valley Heads drift border the upland till is characterized by deep leaching and low carbonate content.

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