THRUST BELT

Kav   ADAVILLE FORMATION
Kbb   BLIND BULL FORMATION
Kh    HILLIARD SHALE
Kf    FRONTIER FORMATION
Kss   SAGE JUNCTION, QUEALY, COKEVILLE, THOMAS FORK, AND SMITHS
           FORMATIONS
Kws   WAYAN AND SMITHS FORMATIONS--One outcrop along Idaho border
Ka    ASPEN SHALE
Kbr   BEAR RIVER FORMATION
Kg    GANNETT GROUP--Includes Smoot Formation, Draney Limestone, Bechler
           Conglomerate, Peterson Limestone, and Ephraim Conglomerate
Jst   STUMP FORMATION, PREUSS SANDSTONE OR REDBEDS, AND TWIN CREEK 
           LIMESTONE
J@n   NUGGET SANDSTONE
J@nd  NUGGET SANDSTONE, ANKAREH FORMATION, THAYNES LIMESTONE, WOODSIDE
           SHALE, AND DINWOODY FORMATION
@ad   ANKAREH FORMATION, THAYNES LIMESTONE, WOODSIDE SHALE AND DINWOODY
           FORMATION
Pp    PHOSPHORIA FORMATION
P&Ma  PHOSPHORIA, WELLS, AND AMSDEN FORMATIONS
P&M   WELLS AND AMSDEN FORMATIONS
Mm    MADISON GROUP
MD    MADISON GROUP AND DARBY FORMATION
Sl    LAKETOWN DOLOMITE--Uinta County
O_    BIGHORN DOLOMITE, GALLATIN LIMESTONE, AND GROS VENTRE FORMATION

                         NORTHERN YELLOWSTONE

Klc   LANDSLIDE CREEK FORMATION
Ket   EVERTS FORMATION, EAGLE SANDSTONE, AND TELEGRAPH CREEK FORMATION
Kc    CODY SHALE
Kft   FRONTIER FORMATION AND MOWRY AND THERMOPOLIS SHALES
KJk   KOOTENAI AND MORRISON FORMATIONS AND ELLIS GROUP
@cd   CHUGWATER AND DINWOODY FORMATIONS
P&Ma  PHOSPHORIA FORMATION AND RELATED ROCKS, QUADRANT SANDSTONE, AND
           AMSDEN FORMATION--Intertonguing equivalent of part of the 
           Phosphoria is Shedhorn Sandstone
MD    MADISON GROUP AND THREE FORKS AND JEFFERSON FORMATIONS
DO    THREE FORKS AND JEFFERSON FORMATIONS AND BIGHORN DOLOMITE
O_    BIGHORN DOLOMITE, SNOWY RANGE FORMATION, PILGRIM LIMESTONE, PARK
           SHALE, MEAGHER LIMESTONE, WOLSEY SHALE, AND FLATHEAD SANDSTONE

                                 NORTH

Kl    LANCE FORMATION
Klm   LANCE FORMATION, FOX HILLS SANDSTONE, MEETEETSE FORMATION, AND
           BEARPAW AND LEWIS SHALES--In the Bighorn Basin consists of
           Lance, Meeteetse, and, in the southeastern part, tongue of
           Lewis Shale; in the northern part of the Wind River Basin,
           of Lance, Meeteetse, and Lewis, and, in the southeastern 
           part of the basin, of Lance and Lewis; on the west side of 
           the Powder River Basin north of T. 45 N., of Lance, Fox Hills, 
           and Bearpaw, and, to the south, of Lance, Fox Hills, and Lewis
Kha   HAREBELL FORMATION
Kfh   FOX HILLS SANDSTONE
Kfl   FOX HILLS SANDSTONE AND LEWIS SHALE
Kfb   FOX HILLS SANDSTONE AND BEARPAW SHALE
Km    MEETEETSE FORMATION
Kml   MEETEETSE FORMATION AND LEWIS SHALE
Kle   LEWIS SHALE
Kmv   MESAVERDE FORMATION
Kso   SOHARE FORMATION
Ksb   SOHARE FORMATION AND BACON RIDGE SANDSTONE
Kb    BACON RIDGE SANDSTONE
Kc    CODY SHALE
Kcf   CODY SHALE AND FRONTIER FORMATION
Ks    STEELE SHALE
Kn    NIOBRARA FORMATION
Kf    FRONTIER FORMATION
Kft   FRONTIER FORMATION AND MOWRY AND THERMOPOLIS SHALES
Kmt   MOWRY AND THERMOPOLIS SHALES
KJ    CLOVERLY AND MORRISON FORMATIONS--In southern Yellowstone area and
           Jackson Hole the presence of the Morrison is questionable