.0 SEDIMENTARY ROCKS OF CRETACEOUS AGE EAST Kl LARAMIE FORMATION--Shale, claystone, sandstone, and major coal beds Kf FOX HILLS SANDSTONE Klf LARAMIE FORMATION AND FOX HILLS SANDSTONE Kvt VERMEJO FORMATION (SHALE, SANDSTONE, AND MAJOR COAL BEDS) AND TRINIDAD SANDSTONE) Kp PIERRE SHALE, UNDIVIDED Kpu Upper unit Kpm Middle unit--In Boulder-Fort Collins area, contains Richard, Larimer, Rocky Ridge, Terry, and Hygiene Sandstone Members; elsewhere, shale between zones of Baculites reesidei and B. scotti Kpl Lower unit--Sharon Springs Member (organic-rich shale and numerous bentonite beds) in lower part Kn NIOBRARA FORMATION--Calcareous shale and limestone Kcg CARLILE SHALE, GREENHORN LIMESTONE, AND GRANEROS SHALE Kc COLORADO GROUP--Consists of Niobrara Formation (Kn) and either Benton Shale or Carlile, Greenhorn, and Graneros Formations (Kcg) Kpg PIERRE SHALE (Kp), NIOBRARA (Kn), AND CARLILE, GREENHORN, AND GRANEROS (Kcg) FORMATIONS, UNDIVIDED Kdp DAKOTA SANDSTONE AND PURGATOIRE FORMATION--Sandstone and shale Kd DAKOTA SANDSTONE OR GROUP NORTHWEST AND WEST-CENTRAL Kl LANCE FORMATION--Shale, sandstone, and minor coal beds; Fox Hills equivalent at base Kmw WINDY GAP MEMBER (UPPER CRETACEOUS?) OF MIDDLE PARK FORMATION-- Andesitic breccia and conglomerate Kls LEWIS SHALE Kmv MESAVERDE FORMATION, UNDIVIDED--Major coal beds in lower part; Rollins Sandstone Member at base in Delta, Gunnison, and Pitkin Counties MESAVERDE GROUP OR FORMATION Kmvu Upper part--In Moffat and Rio Blanco Counties, sandstone, shale, and coal beds above Sego Sandstone. Along Grand Hogback south of Colorado River, sandstone and shale above coal-bearing sequence Kmvl Lower part--Sandstone, shale, and major coal beds