A sandy substratum phase and a flooded phase are recognized. There are no other series in the family. Other similar series are the Atkins , Peoga , and Zipp series. Atkins soils have an irregular decrease in organic matter. Peoga soils have argillic horizons and are fine-silty.
Zipp soils are fine.
The Vincennes soils are typically on nearly level low lying terraces along larger streams. The Vincennes soils formed in loamy waterlaid sediments. The mean annual temperature ranges from about 53 to 57 degrees F, and mean annual precipitation ranges from about 40 to 45 inches. The Bartle , Conotton , Elkinsville , Pekin , Peoga , and Selma soils are associated on the low terraces. All of these soils except Selma have argillic horizons.