Document Type
Article
Publication Date
2-20-2017
Publication Title
Journal of Maps
Keywords
Surficial geologic map, Illinois, Quaternary, Saybrook, Wedron Group, Henry Formation
Abstract
This project involved the construction of a surficial (Quaternary) geologic map of part of McLean County, Illinois. The Saybrook 7.5-minute Quadrangle (scale 1:24,000) was the focus area. The quadrangle largely covers rural agricultural land, but also contains the small town of Saybrook. Multiple, major episodes of glaciation over the past 1,200,000 years have controlled the regional geologic history. The most recent (Wisconsin Episode) glaciation almost exclusively shaped the observed surficial geologic and geomorphic features in the quadrangle. Field observations, USDA soil survey data, private water well data, sparse stratigraphic borehole information, and LIDAR elevation data were used to construct the map. Computational methodologies included ACD Systems Canvas™ and Adobe Acrobat™ software. The surficial geologic map includes four lithostratigraphic units. In stratigraphic order (from oldest to youngest) are the Delavan Member, Tiskilwa Formation, Batestown Member, Lemont Formation, Henry Formation, and Cahokia Formation.
Funding Source
This research was supported by a U.S. Geological Survey EDMAP Award No. G15AC00207 to Dr David Malone at Illinois State University.
DOI
https://doi.org/10.1080/17445647.2017.1291369
Recommended Citation
Rickels, E. S., Stumpf, A. J., Malone, D. H., & Shields, W. E. (2017). Surficial geology of the Saybrook 7.5-minute Quadrangle, Mclean County, Illinois, USA. Journal of Maps, 13(2), 191–195. https://doi.org/10.1080/17445647.2017.1291369.
Surficial geology of the Saybrook 7.5-minute Quadrangle, Mclean County, Illinois, USA
Comments
This article was originally published in Journal of Maps, 2017, vol. 13, no. 2, 191-195; https://doi.org/10.1080/17445647.2017.1291369.
This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/Licenses/bync-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.