Bedrock Geology of Ridgway Quadrangle


Two 34" x 28" map sheets; sheet 1 contains map, legends, and 1 figures; sheet 2 includes descriptive stratigraphic column, 1 cross section, and 2 figures; report contains descriptive text and 5 figures.

Recommended citation:

Nelson, W.J., F.B. Denny, T.H. Larson, and J.R. Breeden, 2017, Bedrock Geology of Ridgway Quadrangle, Gallatin and Saline Counties Illinois: Illinois State Geological Survey, USGS-STATEMAP contract report, 2 sheets, 1:24,000, report, 15 p.


Purchase this map online through Shop ISGS*, or contact the Sales and Information Office for more information.

*excludes EDMAP series and student maps