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Clay coatings (argillans)




ID # 192

Clay coatings (argillans)
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: The clay coatings (argillans) form geopetal structures in voids. These are microlaminated and crescentic.

Data for the horizon
Horizon sampled: 2Btx2
Depth sampled: 1 29-1 84 cm
Physical and chemical data available: C. F. (entire sample) = 17%; sand = 62.5%, clay =
(fine earth fraction); pH = 6.31;
OC = 0.04%; bulk density - — 2.14 Mg m -3
Macromorphological description of horizon: 5 Y 5/1 and 1 0 YR 5/1 fine sandy loam matrix; moderate coarse platy with moderate very coarse prismatic overprint

Physiographic position: North-south trending, bedrock-controlled drumloidal ridge
Topography and hill slope position: 3% west-facing toeslope
Soil climatic data and/or soil water balance: Somewhat poorly drained
Vegetation: Orchard with 30-year-old apple trees and grass

Method
Data for 35-mm slide
Frame length: 3 mm
Light mode: Cross polarized

References
Source - David Lindbo

Slide CT5. 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: 42.2770346
Longitude: -72.40088839999999

Author(s)/Creator(s)

  • * Soil Science Society of America
    SSSA

Submitted By: (SSSA) Soil Science Society of America


Keywords

  • Coatings
  • 2Btx2 Horizon
  • micromorphology
  • Clay coatings

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