92 University Geological Survey of Kansas. 
Thickness.—The Ladore shales have their greatest thickness. 
in the southern part of the state, where they reach a maximum 
of 40 feet. Northeastward they gradually grow thinner, per- 
mitting the two enclosing limestones to come closer and closer 
together until in the vicinity of Uniontown the shales have a 
thickness of from 7 to 10 feet. To the northeast of this they 
continue to grow thinner until at Kansas City and Turner they 
are only about 3 feet thick. On the extreme south, beyond the 
limits of the Bethany Falls limestone, they coalesce with the 
Pleasanton shales, which underlie the Bethany Falls lime- 
stone. 
Character.—In general the Ladore shales are ordinary clay 
shales about the average of those found elsewhere in the Car-. 
boniferous of the state. 
Mound Valley Limestone.®2 
The name Mound Valley limestone was used by this Survey 
in volume I of this series of reports at the suggestion of Doctor 
Adams, who at that time was one of the field assistants. Later 
Adams** abandoned this name and introduced in its stead the 
name Dennis limestone, without giving any reason for so doing. 
His writings, however, show that he confounded the Mound 
Valley limestone with the one first above; or, rather, he recog- 
nized only three of the four limestones occurring here and 
therefore dropped one name. This Survey still uses the name 
Mound Valley, as it did originally, to designate the limestone 
on the hills immediately northwest of Mound Valley. 
Thickness.—The Mound Valley limestone is 3 or 4 feet thick 
at Mound Valley and gradually grows thinner to the southwest 
until it disappears. To the northeast of Mound Valley its 
thickness increases to Uniontown, where it is 16 feet thick. 
From here northward it decreases, and is about 6 feet at 
Kansas City. 
Avea.—The Mound Valley limestone does not extend as far 
south as the state line, but gradually grows thinner until it 
disappears about ten miles north of the state line, one or two 
miles east of the Verdigris river. To the northeast it is co- 
extensive with the Bethany Falls limestone, as already ex-. 
plained, and does its part in the formation of the bluff line and 
scarp line already described. 
ee Adams, Dr. George I.: Univ. Geol. Surv. of Kan., vol. 1, p. 23. Lawrence, 
1896. 
__ 383. Adams, Dr. George I.: U.S. G. S., Bull. 211, p. 36. ‘Washington, 1903. 
