.0                                                                              
             SEDIMENTARY ROCKS OF PENNSYLVANIAN AGE                             
                                                                                
&m     MINTURN FORMATION IN WEST-CENTRAL AND SOUTH-CENTRAL AND OTHER UNITS OF   
         MIDDLE PENNSYLVANIAN AGE--Arkosic sandstone, conglomerate, shale,      
         and limestone.  Includes Madera Formation and Sharpsdale Formation     
         of Chronic (1958) in Sangre de Cristo Range and Gothic Formation of    
         Langenheim (1952) in Elk Mountains                                     
&b     BELDEN FORMATION--Shale, limestone, and sandstone.  Includes Kerber      
         Formation in south-central                                             
&mb    MINTURN AND BELDEN FORMATIONS                                            
&e     EAGLE VALLEY FORMATION--Siltstone, shale, and local gypsum               
&ee    EVAPORITIC FACIES--Gypsum, siltstone, and shale; salt present in deep    
         borings.  Intertongues with Minturn and Lower Maroon Formations.       
         Diapiric structure in many places