56 University of Kansas Geological Survey. 
ing represented as belonging in the “Upper Coal Measures’’), then 
extending easterly across southern Saline and Dickinson counties 
into the southwestern part of Morris, when it turns southwesterly 
across the northwestern part of Marion and the southeastern and 
southern part of McPherson. 
The line just described on St. John’s map was followed prac- 
tically by Doctor Williston on his geological map of Kansas pub- 
lished in 1892. 
The “Geological and Topographical Map of Kansas” by Pro- 
fessor Hay in 1893! represented the base of the Cretaceous system 
in these counties more accurately than it had been given on the 
former maps. The top of the river bluffs from northwest of Abilene 
to the vicinity of Salina were shown as the base of the Cretaceous, 
then the line ran considerably to the west of the river across the 
wide valley of the central part of Saline county, bending easterly 
around the Smoky Hill buttes, crossing the Smoky Hill river near 
Marquette, then following the bluffs south and east of the river 
until opposite the city of Salina. The divide between the Smoky 
Hill river and Gypsum creek, in the eastern part of Saline county, 
was given as Dakota; the line turning easterly at the southeast 
corner of Saline county and crossing the extreme southern part of 
Dickinson county and the southwest corner of Morris county where 
it made a loop turning westerly across the northern part of Marion 
county to the northeast corner of ‘McPherson which it crossed 
diagonally in a southwesterly direction. 
Finally in 1896 Professor Haworth published ‘A Reconnaissance 
Geologic Map of Kansas”* on which so far as the eeology of the 
Smoky Hill valley is concerned, there is an approximate return to 
the geological map of Mudge. The Dakota is represented as cover- 
ing all of Saline county, except a very small area on the central 
part of the Saline-Dickinson county line. The base of the Dakota 
is shown as crossing the Smoky Hill river at the mouth of the Solo- 
mon river, when it runs southeast about one third of the distance 
across Dickinson county, then turns southwest and runs across the 
Saline-Dickinson county line, turning southeast across the south- 
1 Highth Biennial Report State Board of Agriculture. 
2 The University Geological Surv. of Kansas, Vol. 1, Pl. XXXT. 
