Structural features in Illinois

Introduction Guidelines for Naming Structures Removal of Names New Names Major Structural Features Basins, Arches, and Domes Folds and Faults Northern Illinois Western Dlinois Eastern Dlinois Southern Dlinois Structural History Precambrian Cambrian Period Ordovician Period Silurian Period Devonian Period Mississippian Period Pennsylvanian Period Late Paleozoic (?) Compressional Events Mesozoic (?) Extensional Events Cretaceous to Recent Events STRUCTURAL FEATURESCATALOG