Micropitting of some clay materials adjacent structural pores

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Micrometre-sized pits (micropits) were observed both in clay coatings within the upper B horizon of a Red Podzolic soil (Udic Haplustalf), and in the clay matrix adjacent structural pores within a calcitic buried soil. SEM-EDXRA and SEM-low temperature ashing were used to characterise these features and to determine their probable pedogenesis. The micropits in the Red Podzolic B horizon were around 2 μm in size, had either a hemi-ovoidal or a hemi-spheroidal morphology, and were formed by the lysis of microbial cells which had been partially buried during clay deposition on these surfaces. The micropits in the calcitic layer were up to 3 μm in size, were irregularly shaped, and were formed by the dissolution of calcite crystals embedded in the clay matrix.

Original languageEnglish
Pages (from-to)371-376
Number of pages6
JournalGeoderma
Volume46
Issue number4
DOIs
Publication statusPublished - 1990
Externally publishedYes

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clay
B horizons
scanning electron microscopy
buried soils
matrix
red soil
pedogenesis
lysis
calcite
soil formation
paleosol
coatings
crystals
coating
dissolution
crystal
material
soil
temperature
cells

Cite this

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title = "Micropitting of some clay materials adjacent structural pores",
abstract = "Micrometre-sized pits (micropits) were observed both in clay coatings within the upper B horizon of a Red Podzolic soil (Udic Haplustalf), and in the clay matrix adjacent structural pores within a calcitic buried soil. SEM-EDXRA and SEM-low temperature ashing were used to characterise these features and to determine their probable pedogenesis. The micropits in the Red Podzolic B horizon were around 2 μm in size, had either a hemi-ovoidal or a hemi-spheroidal morphology, and were formed by the lysis of microbial cells which had been partially buried during clay deposition on these surfaces. The micropits in the calcitic layer were up to 3 μm in size, were irregularly shaped, and were formed by the dissolution of calcite crystals embedded in the clay matrix.",
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Micropitting of some clay materials adjacent structural pores. / Sullivan, L. A.

In: Geoderma, Vol. 46, No. 4, 1990, p. 371-376.

Research output: Contribution to journalArticle

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T1 - Micropitting of some clay materials adjacent structural pores

AU - Sullivan, L. A.

PY - 1990

Y1 - 1990

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AB - Micrometre-sized pits (micropits) were observed both in clay coatings within the upper B horizon of a Red Podzolic soil (Udic Haplustalf), and in the clay matrix adjacent structural pores within a calcitic buried soil. SEM-EDXRA and SEM-low temperature ashing were used to characterise these features and to determine their probable pedogenesis. The micropits in the Red Podzolic B horizon were around 2 μm in size, had either a hemi-ovoidal or a hemi-spheroidal morphology, and were formed by the lysis of microbial cells which had been partially buried during clay deposition on these surfaces. The micropits in the calcitic layer were up to 3 μm in size, were irregularly shaped, and were formed by the dissolution of calcite crystals embedded in the clay matrix.

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