Transport direction of Peoria Loess in Nebraska and implications for loess sources on the Central Great Plains

Auteur :
MASON, J.A.

Description :
In the midwestern United States, large rivers draining the Laurentide Ice Sheet (LIS) were the most important sources of Peoria Loess, deposited during the last glaciation. In contrast, it has been proposed that thick Peoria Loess on the central Great Plains was derived mainly from unglaciated landscapes northwest of the main loess deposits. In this study, transport directions inferred from more than 600 measurements of Peoria Loess thickness in Nebraska are used to test the hypothesis that much of the Peoria Loess on the Great Plains is nonglaciogenic. Peoria Loess deposition on the central Great plains was largely a direct response to climatic change in the unglaciated source region.


Type de document :
Article de périodique

Source :
Quaternary research, issn : 0033-5894, 2001, vol. 56, n°. 1, p. 79-86, Collation : Illustration, Références bibliographiques : 32 ref.

Date :
2001

Editeur :
Pays édition : Etats-Unis, San Diego, CA, Elsevier