| Carbonate dominated formations either limestone or dolomites of all ages |
| Evaporite units either halite, gypsum, or other saline mineral dominated formatio |
| Metamorphic or igneous units with a dominantly silicic composition all ages |
| Metamorphic or igneous units with dominantly mafic composition all ages |
| Quaternary age older alluvium and surficial deposits |
| Quaternary age younger alluvium and surficial deposits |
| Sandstone dominated formations of all ages |
| Shale dominated formations of all ages |
| Siltstone and or mudstone dominated formations of all ages |
| Unable to determine substrate type |
| Unconsolidated Aeolian sand deposits both active and stabilized |
| Water |