HAWORTH AND BENNETT.| General Stratigraphy. 109 
Area.—Kanwaka shales form a narrow surface zone 
throughout their extent across the state from north to south. 
Northward the shale-beds grow thinner and their outcropping 
correspondingly narrower. 
Characteristics.—The Kanwaka shales are mainly in the 
form of clays, with here and there thin seams of coal, which 
are of no commercial value. A calcareous flagging stone is ob- 
tained from these shales at Waverly and elsewhere, existing as 
lenticular masses of argillaceous limestone, which lie not far 
above the Oread limestone, seen from Coffey county northward 
to perhaps beyond the Kansas river. The remarkable lime- 
stone lentille just east of McLouth, on Tonganoxie creek, is its 
equivalent, although differing from it in characteristics. 
Lecompton Limestones.>9 
This name was given to these limestones by Bennett. They 
are named from the town which was at one time the territorial 
capital of what is now the state of Kansas. They lie immedi- 
ately above the Kanwaka shales. 
Thickness.—The Lecompton limestones, taken together with 
their intervening shales, fill a vertical space of from 15 to 30 
feet at Lecompton and north, but in the southern part of the 
state they separate much more. 
Area.—The Lecompton limestones cover a small space from 
north to south on account of the arenaceous beds above them 
which crowd upon their outcrop from the Kansas river to the 
extreme south, and also where it is seen to the north of the 
Kansas river. 
Characteristics.—The Lecompton limestone is noted locally 
on account of the excellent building stone it produces. North 
of the Kansas river it yields large, beautiful slabs, used exten- | 
sively in Lawrence for curbing-stone and for trimmings in 
large buildings. 
Also great quantities of Fusulina begin to appear in the Le- 
compton limestones. 
Tecumseh Shales.®° 
The Tecumseh shales are so named by Beede. They fill the 
interval between the Lecompton and the Deer Creek limestone. 
Thickness.—The Tecumseh shales vary from 40 to 70 feet in 
thickness, and are of an arenaceous character; which, coupled 
59. Bennett, Rev. John: Univ. Geol. Surv. of Kan., vol. 1, p. 116. 1896. 
60. Beede, Dr. J. W.: Kan. Acad. Sci., vol. xv, pp. 27-34. 1896. at 
