HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Pawluk, S. Articles by Dumanski, J. Search for Related Content PubMed Articles by Pawluk, S. Articles by Dumanski, J. GeoRef GeoRef Citation Agricola Articles by Pawluk, S. Articles by Dumanski, J.

Ferruginous Concretions in a Poorly Drained Soil of Alberta¹

ABSTRACT

Investigations into the nature of a poorly-drained soil pedon developed from acid shales in the Peace River region of Alberta, Canada, revealed the presence of ferruginous concretions in the A and B horizons. Concretions from both horizons were separated into two groups, magnetic and nonmagnetic. Magnetic properties were attributed to the preesnce of maghemite. This mineral was associated with iron oxides amorphous to X-rays in the A horizon and with hematite in the B horizon. Iron oxide in nonmagnetic concretions from the A horizon was X-ray amorphous while that in the B was crystallized as both goethite and hematite.

Magnetic concretions from the A horizon showed dense areas when viewed in thin-sections and contained less organic matter and oxalate extractable iron than the associated nonmagnetic concretions.

An authigenic origin is suggested for the concretions.

¹ Contribution No. 575 of the Research Council of Alberta and Contribution No. T-72-5 from the Alberta Institute of Pedology.

² Professor, Soil Science, University of Alberta, Edmonton, Canada and formerly Research Officer, Research Council of Alberta, Edmonton, Canada presently Research Scientist, Soil Research Institute, Ottawa, Canada, respectively.

Received for publication May 15, 1972. Accepted for publication September 29, 1972.