Dispersibility of glacial loess in particle size analysis, USA.

dc.contributor.authorMays, M
dc.contributor.authorNettleton, WD
dc.contributor.authorGreene, Richard
dc.contributor.authorMason, Joseph A
dc.date.accessioned2015-12-13T22:35:05Z
dc.date.available2015-12-13T22:35:05Z
dc.date.issued2003
dc.date.updated2015-12-11T09:25:38Z
dc.description.abstractSilt- to sand-size clay aggregates are absent or relatively rare in unweathered glacial loesses, but dominant in parna where they resist dispersion in particle size analysis (PSA). There are reports that some aggregates in glacial loesses also resist dispersion. However, one would expect freeze-dried aggregates to have mostly edge-to-face orientation of the platy clays and to be easily dispersed in PSA. We test this hypothesis in this paper. We selected Midwest and Alaskan soils formed in late-Pleistocene loess derived from glacial outwash and floodplains beyond the late-Pleistocene glacial boundary. Analytical methods are those in use by the National Soil Survey Laboratory. Soil A and B horizons dispersed well as shown by the 1.5 MPa water to clay ratios of <0.6. In the C horizon, silt-size, rounded, compound particles (aggregates) were few to common and randomly distributed. A few were volcanic glass. Other aggregates consisted of carbonates or layer silicates. Layer silicate aggregates dispersed well in PSA, as hypothesised; Fe and carbonate cemented aggregates did not. Most of these dispersed when given an ultrasonic dispersion treatment.
dc.identifier.issn0004-9573
dc.identifier.urihttp://hdl.handle.net/1885/76430
dc.publisherCSIRO Publishing
dc.sourceAustralian Journal of Soil Research
dc.subjectKeywords: Aggregates; Carbonates; Particle size analysis; Sand; Silicates; Volcanic glass; Soils; aggregate size; clay; dispersion; loess; soil analysis; United States; Xiphophorus maculatus
dc.titleDispersibility of glacial loess in particle size analysis, USA.
dc.typeJournal article
local.bibliographicCitation.lastpage244
local.bibliographicCitation.startpage229
local.contributor.affiliationMays, M, Natural Resources Conservation Service
local.contributor.affiliationNettleton, WD, University of Nebraska
local.contributor.affiliationGreene, Richard, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationMason, Joseph A, University of Wisconsin
local.contributor.authoremailu9309345@anu.edu.au
local.contributor.authoruidGreene, Richard, u9309345
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.absfor050399 - Soil Sciences not elsewhere classified
local.identifier.ariespublicationMigratedxPub5238
local.identifier.citationvolume41
local.identifier.doi10.1071/SR02035
local.identifier.scopusID2-s2.0-0038334903
local.identifier.uidSubmittedByMigrated
local.type.statusPublished Version

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