Bedrock Geology of Silvis Quadrangle, Rock Island County, Illinois
Two 35" x 30" map sheets; sheet 1 contains map and legends; sheet 2 includes stratigraphic column with descriptions, 1 cross section, descriptive text, 1 figure, 1 plate, and references.
Delpomdor, F.R.A., 2021, Bedrock geology of Silvis Quadrangle, Rock Island County, Illinois: Illinois State Geological Survey, USGS-STATEMAP contract report, STATEMAP Silvis-BG, 2 sheets, 1:24,000.
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