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Ferriargillans in a heavy clay soil




ID # 193

Ferriargillans in a heavy clay soil
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
Description of slide: Illuviation clay coatings (with associated poorly crystaline Fe oxides) with a predominantly unistrial plasmic fabric. This is an unusual feature in a heavy clay soil.

Data for the horizon
Horizon sampled: BC
Depth sampled: 60-92 cm
Physical and chemical data available: See reference
Macromorphological description of horizon: 10 YR 6/2 (dry), 1 0 YR 3.5/2.5 (moist) clay; weak to moderate coarse subangular blocky structure.
Micromorphological description of horizon: Porphyroskelic related distribution pattern.
Predominantly unistrial plasmic fabric. Planar voids and vughs dominant. The few ferriargillans are difficult to distinguish from unistrial orientation. Few neosesquans.

Soil Classification
U.S.: Boron
Canada: Gray Luvisol

Physiographic position: Plain
Parent material: Lacustrine clay
Vegetation: Northern boreal forest

Method
Data for 35-mm slide
Frame length: 1 .2 mm
Light mode: Cross polarized

References
Dasog, G. S. , A. R. Mermut, D. F. Acton. 1 987. Micromorphology and submicroscopy of illuviated mineral particles in boreal clay soils of Saskatchewan, Canada. Geoderma 40: 1 93-208.
Source - A. R. Mermut

Slide CT6. 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: 55.10648699999999
Longitude: -105.27561589999999

Author(s)/Creator(s)

  • * Soil Science Society of America
    SSSA

Submitted By: (SSSA) Soil Science Society of America


Keywords

  • Coatings
  • BC horizon
  • micromorphology
  • Ferriargillans

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