Baylis Formation

Baylis Formation (western Illinois).
State Illinois
Name Baylis Formation
Geologic age Upper Cretaceous (Campanian)
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)Baylis Fm contains a basal gravel.
Comments Thickness from stratigraphic columns: Baylis Fm (0-100’). The Baylis Formation is laterally equivalent to the Post Creek (Tuscaloosa) Formation in southern Illinois.
References

Kolata, D.R., comp., 2005, Bedrock Geology of Illinois: Champaign, Ill., Illinois State Geological Survey, Illinois Map Series 14, scale 1:500,000.

NGMDB product
Counties Adams - Pike