The only formal morphostratigraphic units recognized in IL are units related to moraines that are called "drifts." Is named for Paris, Edgar Co, IL (Illinois basin); is based on the Paris Moraine (mapped on pl. 1), which is the inner moraine of the Shelbyville Morainic System. The Paris is broader, as much as 4 mi wide, and has a more irregular crest, generally about 50 ft lower, than the Westfield and Nevins Moraines of the Shelbyville System. In its western part it is separated from the Nevins Moraine by well-defined valleys, tributaries of the Embarras River. It is the most extensive of the three Shelbyville Moraines, extending westward beyond the area where the Westfield and Nevins Moraines can be differentiated. At its eastern end it abruptly narrows, its morainic topography diminishes within a few mi, and it terminates before reaching the IN state line. Deposited by the Decatur Sublobe of the Erie Lobe. Assigned to Woodfordian Substage of Wisconsinan Stage in Pleistocene Series.

Source: GNU records (USGS DDS-6; Denver GNULEX).