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Subangular blocky microstructure




ID # 244

Subangular blocky microstructure
From the Soil Micromorphology Slide Collection

STEM Standard addressed: ESS2E - Biogeology


Appropriate Grade Level(s)
  • College-level
Materials are best used for
  • Classroom Lectures
  • Laboratory Activities
General Course Areas
  • Soil Microbiology
Description
Data for the horizon Horizon sampled: BE Depth sampled: 21-28 cm
Macromorphological description of horizon: 10 YR 4/3; silt loam; moderate medium parting to fine subangular blocky structure; friable; common medium roots; common 10 YR 3/1 organic coatings along channels and fecal pellets.

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.: Fine-silty, mixed, mesic Typic Hapludalf (Fayette series)

Physiographic position: Upland
Topography and hill slope position: 4% slope; summit Parent material: Wisconsinan loess (Peoria)
Climatic data: MAP = 864 mm; humid continental climate
Drainage class: Well
Vegetation: Second growth deciduous forest (pastured)

Method
Data for 35-mm slide
Frame length: 7 mm
Light mode: Plane polarized

References
Source - M. L. Thompson

Slide MS9. Soil Science Society of America, 1993. A Reference Slide Collection for Soil Micromorphology. SSSA, Madison, WI.

Peer Review: Yes

Credit this item to: SSSA
Media Date: 1993-01-01
Provided By: (SSSA) Soil Science Society of America

Latitude: 42.1292592
Longitude: -92.539603

Author(s)/Creator(s)

  • * Soil Science Society of America
    SSSA

Submitted By: (SSSA) Soil Science Society of America


Keywords

  • Porosity and Microstructure
  • BE Horizon
  • micromorphology
  • Subangular blocky microstructure

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