Plate 1. Map of Indiana showing locations of type sections, localities, and area for Paleozoic rock units named for Indiana places 682K.
Plate 2. Charts showing Paleozoic rock-unit names used in Indiana: A, Pennsylvanian; B, Mississippian; C, Devonian; D, Silurian; E, Ordovician and Cambrian 1250K.
Figure 1. Chart showing significant development in nomenclature of the Sanders Group.