Mineral Resources
Online Spatial Data
Geology
by state
Illinois geologic units
Geologic units in Jefferson county, Illinois
Mattoon Formation
(Pennsylvanian (Kasimovian))
at surface, covers 67 % of this area
Mattoon Formation.
Bond Formation
(Pennsylvanian (Kasimovian))
at surface, covers 32 % of this area
Bond Formation
Shelburn-Patoka Formations undivided
(Pennsylvanian (Kasimovian))
at surface, covers 0.5 % of this area
Shelburn-Patoka Formations undivided.