.0                                                                              
                                                                                
            WEST-CENTRAL AND SOUTH-CENTRAL (Continued)                          
M_     LEADVILLE, GILMAN, DYER, PARTING, FREMONT, HARDING, MANITOU, DOTSERO,    
         PEERLESS, AND SAWATCH FORMATIONS; SOME FORMATIONS ABSENT LOCALLY       
MD_    LEADVILLE, GILMAN, DYER, PARTING, AND SAWATCH FORMATIONS                 
MDO    LEADVILLE, GILMAN, DYER, PARTING, FREMONT, HARDING, AND MANITOU          
         FORMATIONS                                                             
DO     PARTING, FREMONT, AND HARDING FORMATIONS                                 
_s     SAWATCH QUARTZITE--Locally includes Peerless Formation                   
                                                                                
                         UINTA MOUNTAINS                                        
Mm     MADISON LIMESTONE (MISSISSIPPIAN)--Upper part includes equivalents of    
         Upper Mississippian Doughnut and Humbug Formations (shale, limestone,  
         and sandstone)                                                         
_l     LODORE FORMATION (CAMBRIAN)--Sandstone, shale, and conglomerate          
M_ml   MADISON LIMESTONE AND LODORE FORMATION                                   
                                                                                
                          FAR SOUTHWEST                                         
MD_    LEADVILLE LIMESTONE (MISSISSIPPIAN), OURAY LIMESTONE (DEVONIAN), ELBERT  
         FORMATION (DEVONIAN, SHALE AND SANDSTONE), AND IGNACIO QUARTZITE       
         (CAMBRIAN)                                                             
MD     LEADVILLE, OURAY, AND ELBERT FORMATIONS