Variability of depth to carbonates in fingertip loess watersheds in Iowa

摘要: Summary Depth to carbonates is compared statistically with slope gradient and direction of the ground surface also thickness uppermost subdivision loess. Stratification data in accordance age landscape elements necessary, especially view postglacial changes regional climate vegetation. The correlations alone are negative, but nonsignificant for younger elements. Inclusion as a second independent variable cyclic model regression equation raises percentage explained variation general markedly so overall correlation between depth loess sub division positive. But trends different when comparing opposite valley sideslopes backslope footslope portions within individual sideslopes. potential effect assymetric erosion on these considered be subordinate differentiating subsurface temperature moisture regime which affects leaching process.