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)