Two 34" x 28" map sheets; sheet 1 contains map, legends, and 1 figures; sheet 2 includes descriptive stratigraphic column, 1 cross section, 2 images, and descriptive text.
Breeden, J.R., J.A. Devera, W.J. Nelson, and F.B. Denny, 2018, Bedrock Geology of Baldwin Quadrangle, Randolph and St. Clair Counties, Illinois: Illinois State Geological Survey, USGS-STATEMAP contract report, 2 sheets, 1:24,000.