| 1 water water |
| 2 Qh Holocene |
| 3 Qp Pleistocene |
| 4 Q Quaternary |
| 5 Qv Quaternary volcanic rocks |
| 6 Qf Quaternary felsic volcanic rocks |
| 7 Tp Pliocene |
| 8 Tpc Pliocene continental |
| 9 Tpv Pliocene volcanic rocks |
| 10 Tpf Pliocene felsic volcanic rocks |
| 11 Tm Miocene |
| 12 Tmc Miocene continental |
| 13 Tmoe Miocene and Oligocene eugeosynclinal |
| 14 uTa Upper Tertiary andesite |
| 15 Ti Tertiary intrusive rocks |
| 16 To Oligocene |
| 17 Toc Oligocene continental |
| 18 Toee Oligocene and Eocene eugeosynclinal |
| 19 Tmv Miocene volcanic rocks |
| 20 Tmf Miocene felsic volcanic rocks |
| 21 Te3 Eocene Jackson Group |
| 22 Tec Eocene continental |
| 23 Tee Eocene eugeosynclinal |
|
| 24 lTv Lower Tertiary volcanic rocks |
| 25 lTf Lower Tertiary felsic volcanic rocks |
| 26 Te2 Eocene Claiborne Group |
| 27 Te Eocene |
| 28 Teb Eocene Marine pillow basalt |
| 29 lTa Lower Tertiary andesite |
| 30 Te1 Eocene Wilcox Group |
| 31 Tel Eocene lacustrine |
| 32 Tx Paleocene |
| 33 Txc Paleocene continental |
| 34 uK4 Navarro Group |
| 35 uK3 Taylor Group |
| 36 uK3b Taylor Group |
| 37 Kg3 Latest Cretaceous granitic |
| 38 uK3a Taylor Group |
| 39 uK2 Austin and Eagle Ford Groups |
| 40 Kg2 Upper Cretaceous granitic |
| 41 uK Upper Cretaceous |
| 42 Kc Cretaceous continental |
| 43 Ke Cretaceous eugeosynclinal |
| 44 Kv Cretaceous volcanic rocks |
| 45 Kg Cretaceous granitic rocks |
| 46 uK1 Woodbine and Tuscaloosa groups |
| 47 Kgn Cretaceous border gneiss of Idaho batholith |
| 48 lK3 Washita Group |
| 49 lK2 Fredericksburg Group |
| 50 lK Lower Cretaceous |
| 51 Kg1 Lower Cretaceous granitic rocks |
| 52 Ki Cretaceous intrusive rocks |
| 53 lK1 Trinity group |
| 54 uMze Upper Mesozoic eugeosynclinal |
| 55 J Jurassic |
| 56 Jc Jurassic continental |
| 57 lMzv Lower Mesozoic volcanic rocks |
| 58 Jg Jurassic granitic rocks |
| 59 Jmi Jurassic mafic intrusives |
| 60 JTr Lower Jurassic and upper Triassic |
| 61 lMz Lower Mesozoic |
| 62 lMze Lower Mesozoic eugeosynclinal |
| 63 Trv Mafic Lava interbedded in Triassic Newark Group |
| 64 Trg Triassic granitic group |
| 65 Tri Triassic mafic intrusives |
| 66 Tr Triassic |
| 67 TrPe Triassic and Permian eugeosynclinal |
| 68 P4 Ochoan Series |
| 69 P3b Upper part of Guadalupian Series |
| 70 P3 Guadalupian Series |
| 72 P3a Lower part of Guadalupian Series |
| 73 P Permian |
| 74 Pe Permian eugeosynclinal |
| 75 P2b Upper part of Leonardian Series |
| 76 um Ultramafic rocks |
|
| 77 P2a Lower part of Leonardian Series |
| 78 P2 Leonardian Series |
| 79 P2ac Early Leonardian continental |
| 80 P1 Wolfcampian Series |
| 81 P1c Wolfcampian Series continental |
| 82 cat Catacalastic rocks |
| 83 PP4 Virgilian Series |
| 84 Pzg3 Upper Paleozoic granitic rocks |
| 85 PP3 Missourian Series |
| 86 PP2 Des Moinesian Series |
| 87 PP Pennsylvanian |
| 88 ms schist and phyllite |
| 89 PP1 Atokan and Morrowan Series |
| 90 uPz Upper Paleozoic |
| 91 uPze Upper Paleozoic eugeosynclinal |
| 92 mm1 felsic paragneiss and schist |
| 93 PP1a Atokan and Morrowan Series, Jackfork SS |
| 94 uPzc Upper Paleozoic clastic wedge facies |
| 95 mm2 mafic paragneiss (=hornblendite, amphibolite) |
| 96 mm3 migmatite |
| 97 M3 Chesterian Series |
| 98 Pzmi Paleozoic mafic intrusives |
| 99 mm4 felsic orthogneiss (=granite gneiss) |
| 100 M2 Meramecian Series |
| 101 M Mississippian |
| 102 M1 Osagean and Kinderhookian Series |
| 103 D3 Upper Devonian |
| 104 D3c Upper Devonian continental |
| 105 Pzg2 Middle Paleozoic granitic rocks |
| 106 D2 Middle Devonian |
| 107 D Devonian |
| 108 D2c Middle Devonian continental |
| 109 De Devonian eugeosynclinal |
| 110 Dv Devonian volcanic |
| 111 D1 Lower Devonian |
| 112 DS Devonian and Silurian |
| 113 DSe Devonian and Silurian eugeosynclinal |
| 114 DSv Devonian and Silurian volcanic rocks |
| 115 Se Silurian eugeosynclinal |
| 116 Sv Silurian volcanic |
| 117 S3 Upper Silurian (Cayugan) |
| 118 S2 Middle Silurian (Niagaran) |
| 119 S Silurian |
| 120 lPze Lower Paleozoic eugeosynclinal |
| 121 S1 Lower Silurian (Alexandrian) |
| 122 SOe Silurian and Ordovician eugeosynclinal |
| 123 O3 Upper Ordovician (Cincinnatian) |
| 124 lPz Lower Paleozoic |
| 125 O2 Middle Ordovician (Mohawkian) |
| 126 O Ordovician |
| 127 Oe Ordovician eugeosynclinal |
| 128 Ov Ordovician volcanic rocks |
| 129 Pzg1 Lower Paleozoic granitic rocks |
| 130 O1 Lower Ordovician (Canadian) |
| 131 O1b Lower Ordovician (Canadian) |
| 132 O1a Lower Ordovician (Canadian) |
| 133 OC Lower Ordovician and Cambrian carbonate rocks |
| 134 C Cambrian |
| 135 Ce Cambrian eugeosynclinal |
| 136 Cv Cambrian volcanics |
| 137 Cg Cambrian granitic rocks |
| 138 Cq basal Lower Cambrian clastic rocks |
| 139 Z Z sedimentary rocks |
| 140 Zg Z granitic rocks |
| 141 Zv Z volcanic rocks |
| 142 Y3 Missoula group |
| 143 Y Y sedimentary rocks |
| 144 Yv Y volcanic rocks |
| 145 Yg2 Younger Y granitic rocks |
| 146 Ys Syenite |
| 147 Ym Paragneiss and schist |
| 148 Y2 Wallace, Siyeh and Helena Formations |
| 149 Ya Anorthosite |
| 150 Y1 Ravalli Group and Prichard Formation |
| 151 Yg1 Older Y granitic rocks |
| 152 Ymi Mafic intrusives |
| 153 Ygn Orthogneiss |
| 154 X X metasedimentary rocks |
| 155 Xv X volcanic rocks |
| 156 Xg X granitic rocks |
| 157 Xm Orthogneiss and paragneiss |
| 158 W W metasedimentary rocks |
| 159 Wv W volcanic rocks |
| 160 Wg W granitic rocks |
| 161 Wmi W mafic intrusives |
| 162 Wgn Orthogneiss and paragneiss |
| <all other values> |
