County mapping is carried out at the ISGS under a variety of programs. The programs exist for different purposes and require different levels of scientific review. Maps are published in specific Series based on the program under which they were created and the corresponding level of review.

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Displaying 81 - 86 of 86
Map Images Title Description Theme Series County Publication Date Authors
Surficial Geology of Whiteside County Surficial Geology of Whiteside County, Illinois

One 45" x 35" map sheet containing map and legends; 3-page report includes descriptive text with 1 table.

 Surficial Geology Illinois County Geologic Map Series (ICGM) Whiteside 2013 Richard C. Anderson, Xiaodong Miao
Williamson County Surficial Geology Map Sheet 1 Williamson County Surficial Geology Map Sheet 2 Surficial Geology of Williamson County, Illinois

Two 35.5" x 32" map sheets and one 11-page report; sheet 1 contains map and legends; sheets 2 includes 3 cross sections and 4 figures; report contains descriptive text, 1 figure, and 1 table

 Surficial Geology Williamson 2020 David A. Grimley, Leon R. Follmer, W. John Nelson
Thickness of Quaternary Deposits of Tazewell County Thickness of Quaternary Deposits of Tazewell County, Illinois

1:62,500 Tazewell County map; 40" x 36" single map sheet; includes map, legend, and inset maps (2)

 Quaternary DepositsDrift Thickness Open File Series (OFS) Tazewell 2003 Patrick D. Johnstone
Thickness of Quaternary Materials in McLean County Thickness of Quaternary Materials in McLean County, Illinois

1:100,000 McLean County area map; 40" x 27" single map sheet; includes map, legend, descriptive text, and inset map

 Quaternary DepositsDrift Thickness Open File Series (OFS) McLean 1997 Melisa M. McLean, Maureen D. Kelly, Matthew H. Riggs
Three-dimensional Geologic Model, Kane County Three-dimensional Geologic Model, Kane County, Illinois

One 27" x 33" map sheet; includes 3-D geologic model and descriptive text with figure

 Three-dimensional Model Illinois County Geologic Map Series (ICGM) Kane 2007 Curt C. Abert, William S. Dey, Alec M. Davis, B. Brandon Curry
Topography of the Bedrock Surface in McLean County Topography of the Bedrock Surface in McLean County, Illinois

1:100,000 McLean County area map; 40" x 30" single map sheet; includes map, legend, descriptive text, and inset maps (2)

 Bedrock Topography Open File Series (OFS) McLean 1997 Melisa M. McLean, Maureen D. Kelly, Matthew H. Riggs