Key: Green
- Mainly Marine Stratified Sequences
- Limits of Pleistocene glacial deposits
- uK4 Navarro Group (Cretaceous)
- uK3, uK3b, Uk3a Taylar Group (Cretaceous)
- uK2 Austin and Eagle Ford Group (Cretaceous)
- uK1 Woodhine and Tuscaloosa Groups (Cretaceous)
- uK Upper Cretaceous
- lK3 Washita Group (Cretaceous)
- lK2 Fredericksburg Group (Cretaceous)
- lK1 Trinity Group (Cretaceous)
- lK lower Cretaceous
- J Jurassic
- JTr Lower Jurassic and Upper Triassic
- Tr Triassic
- lMz lower Mesozoic
- Continental Deposits
- Kc Cretaceous
- Jc Jurassic
- Eugeosynclinal Deposits
- Ke Cretaceous
- uMze Upper Mesozoic
- lMze Lower Mesozoic
- Volcanic Rocks
- Kv Cretaceous volcanic rocks
- lMzv Lower Mesozoic volcanic rocks
- Trv mafic lava interbedded in Triassic Newark Group
- Intrusive Rocks
- Kg3 Latest Cretaceous granitic
- Kg2 Upper Cretaceous granitic
- Kg1 Lower Cretaceous granitic
- Jg Jurassic granitic
- Trg Triassic granitic
- Phanerozoic Metamorphic Complexes
- ms schist and phyllite
- mm1 felsic paragneiss and schist
- mm2 mafic paragneiss and schist
- mm3 migmatite
- mm4 felsic orthogneiss (=granite gneiss)