From the Soil Micromorphology Slide Collection

Description of slide: Oxidized ped interior and reduced zones along voids (pseudogley) with clay illuviation infillings predominantly in the oxidized parts.

Data for the horizon Horizon sampled: B22tg Depth sampled: 70 cm
Physical and chemical data available: Sand = 42%, silt = 28%, clay = 30%; pH = 3.6.
Macromorphological description of horizon: Strongly mottled 10YR 7/1 and 7.5YR 6/5 clay loam; strong rough prismatic parting to modertate rough angular blocky structure; many large biopores.
Micromorphological description of horizon: Mainly asepic but locally insepic plasmic fabric; many craze planes and common channels and vughs in sizes as much as several millimeters.

Data for thin section
Preparation of sample: Air dry
Impregnating medium: Polyester resin
Thickness of section: 30 µm
Orientation of section: Vertical


Soil Classification
U.S.: Aerie Ochraqualf
F.A.0.: Eutric Podzoluvisol

Elevation: 9 m
Physiographic position: Transitional between well-drained ridges and poorly drained gullies of a former braided river system
Topography and hill slope position: Slightly undulating
Parent material: Late Weichselian, poorly sorted, braided river sediment (clay loam) Soil climatic data and/or soil water balance: Imperfectly drained
Vegetation: Arable land and grassland

Data for 35-mm slide
Frame length: 0.8 mm
Light mode: Cross polarized

Miedema, R., E. van Engelen, and Th. Pape. 1978. Micromorphology of a toposequence of late Pleistocene fluviatile soils in the eastern part of the Netherlands. p. 469-501. In M. Delgado (ed.) Soil Micromorphology. T. Arte Prieto Moreno, Granada, Spain.
Source - R. Miedema

Slide CT36. Soil Science Society of America, 1993. A Reference Slide Collection for Soil Micromorphology. SSSA, Madison, WI.