GEOLOGIC MAP OF THE DANVERS 7.5 MINUTE QUADRANGLE, MCLEAN AND WOODFORD TAZEWLL COUNTIES, ILLINOIS

The Danvers 7.5' quadrangle is located in McLean County as well as a small section of Woodford Tazewell County, Illinois. The quadrangle's area is between 89° 15' and 89° 07' 30” west longitudes, and 40° 37' 30” and 40° 30' north latitudes. The task was supported by grants given by the U.S. Geological Survey EDMAP and the Illinois State Geological Survey. Soil maps were used to create the surficial geological map according to the formation and content. Parent materials were interpreted based on these parameters and elevation. Well-known formations such as the Cahokia Alluvium, bedded silts and clays from lake sediment from the Equality Formation, and bedded sands with gravels from river sediment of the Henry Formation. Peoria silt was grouped and mapped as soils forming in loess greater than 1.5 meters. The pebbly loam, Tiskilwa, and fine sandy loam, Lamont Member of the Wedron Formation were grouped together as till units. The complied soils map was digitized in Canvas 10. When the surface map is digitized, it can be geo-rectified and brought into Global Mapper and layered with a DRG, DEM, aerial photo, or additional representation of the quadrangle for improvement or assessment.