Geology of the Mackinaw River Watershed, Mclean, Woodford, and Tazewell Counties, Illinois
Geology of the Mackinaw River Watershed, McLean, Woodford, and Tazewell Counties, Illinois C. Pius Weibel and Robert S. Nelson Geological Science Field Trip Guidebook 2009A April 18, 2009 May 2, 2009 Institute of Natural Resource Sustainability ILLINOIS STATE GEOLOGICAL SURVEY Cover photograph: View of the Mackinaw River (photograph by W.T. Frankie). Acknowledgment The information in the first part of this guidebook is adapted from ISGS FieldTrip Guidebook 2004A, Guide to the Geology of the Pekin Area, Tazwell and Mason Counties, Illinois, by Wayne T. Frankie, Russell Jacobson, and Robert S. Nelson. Geological Science Field Trips The Illinois State Geological Survey (ISGS) conducts four tours each year to acquaint the public with the rocks, mineral resources, and landscapes of various regions of the state and the geological processes that have led to their origin. Each trip is an all-day excursion through one or more Illinois counties. Frequent stops are made to explore interesting phenomena, explain the processes that shape our environment, discuss principles of earth science, and collect rocks and fossils. People of all ages and interests are welcome. The trips are especially helpful to teachers who prepare earth science units. Grade school students are welcome, but each must be accompanied by a parent or guardian. High school science classes should be supervised by at least one adult for every ten students. The inside back cover shows a list of guidebooks of earlier field trips. Guidebooks may be obtained by con- tacting the Illinois State Geological Survey, Natural Resources Building, 615 East Peabody Drive, Cham- paign, IL 61820-6964 (telephone: 217-244-2414 or 217-333-4747).
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