2.2 Descending from low terrace onto flood plain of Smoky Hill River. 2.4 Tailings at site of abandoned Dakota lignite mine visible in draw at 1 o'clock. 2.6 Crossing Smoky Hill River. Note channel sandstone body in Dakota at right. 2.7 Terrace alluvium on left at south end of bridge. 2.8 Dakota Formation on right. Sandy carbonaceous shale overlain by clean quartzose sandstone. 2.9-3.0 STOP 1. Reboard bus at top of hill. Return to Wilson. 6.0 Flashing light in Wilson. Turn right (east). 6.3 Junction with Kansas Highway 232. Turn left (north) on K-232. 7.0 Early Pleistocene alluvium exposed in roadside ditches. 7.6 Dakota Formation exposed in roadside ditch on right. Contains fragmentary pieces of limonitized wood and sparse impressions of angiosperm leaves. 7.8 Dakota in ditch on right. 8.1 Overpass at Interstate Highway 70. Turn left (west) onto westbound ramp at north end of overpass. 8.3-8.5 Dakota Formation poorly exposed in roadbank on right. 8.8 Ascending escarpment held up by Greenhorn Limestone. 9.1 Entering Russell County. 9.8 Greenhorn Limestone poorly exposed in roadside ditch on right. 10.1-10.3 Greenhorn Limestone exposed in deep roadcut. Upper part of Hartland Shale Mem- ber through lower part of Pfeifer Shale Member. 11.0 Underpass. 11.0-11.2 Upper part of Jetmore Chalk Member and lower part of Pfeifer Shale Member ex- posed in roadcut. 11.9-12.0 Weathered lower part of Fairport Chalk Member of Carlile Shale poorly exposed in roadcut. (Marker bed known as "pink lime" is exposed here). 12.1 View west across upland surface of Smoky Hills. 12.5 Bluff on south side of Smoky Hill River visible in distance on left. 12.9 Underpass. 12.9-13.2 Jetmore Chalk Member and lower part of Pfeifer Shale Member exposed in roadcut. 14.3 Dorrance exit. Cuts in upper part of Jetmore and lower part of Pfeifer. Aban- donned quarry in Fencepost limestone in pasture northeast of exit. 15.4-15.5 Upper two-thirds of Hartland and lower part of Jetmore exposed in roadcut. 15.6-15.7 Roadcut in Jetmore Chalk Member. 15.9 Overpass. 16.4 Overpass above tracks of Union Pacific Railway Co. 16.6 Temporary end of I-70. Proceed westward on U.S. 40. 17.9 Lower part of Fairport poorly exposed in roadcut on left. Collignoniceras woollgari. 30