Origin and paleoclimatic signifi cance of late Quaternary loess in Nebraska: Evidence from stratigraphy, chronology, sedimentology, and geochemistry

Authors

Daniel R. Muhs, U.S. Geological SurveyFollow
E. Arthur Bettis III, University of IowaFollow
John N. Aleinikoff, U.S. Geological Survey
John P. McGeehin, U.S. Geological Survey
Jossh Beann
Gary Skipp, U.S. Geological SurveyFollow
Brian D. Marshall, U.S. Geological Survey
Helen M. Roberts, University of WalesFollow
William C. Johnson, University of Kansas
Rachel Benton, U.S. National Park Service

Document Type

Article

Date of this Version

2008

Comments

Published in GSA Bulletin; November/December 2008; v. 120; no. 11/12; p. 1378–1407.

Abstract

Loess is one of the most extensive surfi cial geologic deposits in mid-continental North America, particularly in the central Great Plains region of Nebraska. Last-glacial-age loess (Peoria Loess) reaches its greatest known thickness in the world in this area. New stratigraphic, geochronologic, mineralogic, and geochemical data yield information about the age and provenance of Peoria Loess, as well as evaluation of recent climate models.