.0                                                                              
                                                                                
                                                                                
J@mg   MORRISON, CURTIS, ENTRADA, AND GLEN CANYON FORMATIONS--Curtis is absent  
         along Grand Hogback                                                    
J@mc   MORRISON, ENTRADA, AND CHINLE FORMATIONS--Along southern Grand Hogback,  
         Chinle is represented only by basal Gartra Sandstone Member