Geologic units in Franklin county, Texas

Wilcox Group, undivided (Paleocene to Eocene) at surface, covers 36 % of this area

Wilcox Group, undivided

Midway Group, undivided (Paleocene) at surface, covers 34 % of this area

Midway Group, undivided

Alluvium (Holocene) at surface, covers 12 % of this area

Alluvium

Carizzo Sand (Eocene) at surface, covers 10 % of this area

Carizzo Sand

Reklaw Formation (Eocene) at surface, covers 4 % of this area

Reklaw Formation

Terrace deposits (Pleistocene and Holocene) at surface, covers 2 % of this area

Terrace deposits

Navarro Group, undivided (Late Cretaceous; Gulfian Series) at surface, covers 0.5 % of this area

Navarro Group, undivided

Queen City Sand (Eocene) at surface, covers 0.3 % of this area

Queen City Sand