Glen Rose Limestone
Navarro and Taylor Groups, undivided
Austin Chalk
Navarro Group and Marlbrook Marl, undivided
Terrace deposits
High gravel deposits
Fredericksburg Group
Walnut Clay
Edwards Limestone
Ozan Formation
Alluvium
Pecan Gap Chalk
Hensell Sand
Cow Creek Limestone, Hammett Shale, and Sycamore Sand, undivided
Midway Group, undivided
Neylandville and Marlbrook Marls, undivided
Del Rio Clay and Georgetown Limestone, undivided
Eagle Ford Formation and Buda Limestone, undivided
Onion Creek Marl
Igneous rocks of Austin age
Paluxy Sand and Glen Rose Limestone, undivided
Edwards and Comanche Peak Limestones, undivided