Soils with Lamellae - Soil Geography of the USA: A Diagnostic-Horizon Approach - page 276

Fig. 24.1 Lamellae in the Spinks soil series at 40 cm ( L ) and 100 cm ( R ) depth. The soil is a sandy,
mixed, mesic Lamellic Hapludalfs under coniferous forest in NE Dane County in Wisconsin, USA.
The lamellae at 40-50 cm were less than 2 mm thick and slightly finer than the interlamellae soil
textures. Below 100 cm the lamellae were thicker (1-2 cm) and had sandy loam textures, whereas
the interlamellae matrix was a loamy sand (Bockheim and Hartemink 2013 )
Fig. 24.2 Lamellae in the Oshtemo soil series below 185 cm depth. The soil is a coarse-loamy,
mixed, active, mesic Typic Hapludalfs under forest in Adams County in Wisconsin, USA. The
lamellae at that depth were seveal cm thick and slightly finer than the interlamellae soil textures.
The lamellae are not described in the Official Series Description of USDA-NRCS but commonly
associated soils (Coloma series) have lamellae below 99 cm (Bockheim and Hartemink 2013 )
24.3 Classification of Soils with Lamellae
Based on an analysis of information in the SSURGO database, 118 soil series were
found to have lamellae. They occur in six orders: Entisols (40 soil series; 34 % of
total), Alfisols (39 series; 33 %), Inceptisols (25 series; 21 %), Spodosols (9 series;
7.6 %), Ultisols (4 series; 3.3 %), and Mollisols (1 series; 0.4 % of total area)
(Table 24.4 ). These soils represent 14 suborders, 25 great groups, and subgroups.