Micromorphology of a "welded" Sangamonian to Wisconsinan age paleosol in southwestern Wisconsin

David S. Leigh, Kevin McSweeney, James C. Knox

Research output: Contribution to journalArticlepeer-review


Micromorphological characteristics indicate that in southwestern Wisconsin pedogenesis transgressed the Sangamonian-Wisconsinan chronostratigraphic boundary in conjunction with colluvial and eolian sedimentation. The use of micromorphology helps to distinguish between pedological, colluvial, and eolian components in the paleosol horizon sequence, which can be difficult to resolve and interpret solely from field investigations and from other laboratory analyses. Results show that a basal loess "mixed zone" within the welded paleosol profile contains features that are the products of colluvial reworking processes. We present micromorphology data which support stratigraphic relationships suggesting that colluvial processes were important in the formation of basal loess "mixed zones" in addition to other possible mixing processes such as pedoturbation and bioturbation.

Original languageEnglish (US)
Pages (from-to)575-587
Number of pages13
Issue number6
StatePublished - Dec 1989
Externally publishedYes

ASJC Scopus subject areas

  • Earth-Surface Processes


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