| Code: | Description: |
| FIRE | fireclay |
| FLIN | flint |
| FSCL | fine grained silicic |
| GABB | gabbro |
| GANS | ganister |
| GLCL | galuconitic claystone |
| GLML | glauconitic marl |
| GLSL | glauconitic siltstone |
| GLUS | glauconitic sand |
| GNEI | gneiss |
| GRAN | granite |
| GRAV | gravel |
| GRDI | granodiorite |
| GRGN | granite gneiss |
| GRIT | grit |
| GSCH | greenschist |
| GWKE | greywacke |
| GWSH | granite wash |
| GYPS | gypsum |
| HALI | halite (salt) |
| HORN | hornfels |
| HYAL | hyaloclastite |
| IGNS | igneous rock |
| IGSD | igneous sediment |
| ILLT | illite |
| INIG | intrusive igneous |
| INTB | interbedded strata |
| IRST | ironstone |
| KIES | kieserite |
| KLNT | kaolinite |
| LANG | langbeinite |
| LAVA | lava |
| LIGN | lignite |
| LMST | limestone |
| LOES | loess |
| MARB | marble |
| MARL | marl |
| MDIO | metadiorite |
| MDST | mudstone |
| META | metamorphic rock |
| MGRA | Microgranite |
| MIGM | migmatite |
| MISC | miscellaneous sediments |
| MNTM | montmorillonite |
| MQTZ | metaquarzite |
| MSAL | magnesium salt |
| MSED | metasediment |
| MUD | mud |
| OBSN | obsidian |
| OILS | oil shale |
| OOCL | oolitic claystone |
| OOIR | oolitic ironstone |
| OOLM | oolitic limestone |
| OOMD | oolitic mudstone |
| OOSD | oolitic sandstone |
| Page 2 of 4 | 07/07/2004 |