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         SEDIMENTARY ROCKS OF JURASSIC AND TRIASSIC AGE                         
                                                                                
J@g    GLEN CANYON SANDSTONE--In northwest                                      
J@gc   GLEN CANYON GROUP AND CHINLE FORMATION--In southwest.  Glen Canyon       
         Group consists of Navajo Sandstone, Kayenta Formation (red siltstone,  
         shale, and sandstone), and Wingate Sandstone; Chinle is red siltstone