HAWORTH AND BENNETT.|] General Stratigraphy. 61 
pany, at Neodesha, and the other presented to the museum 
of the State University. Immediately upon their receipt a 
superficial examination was made, the results of which were 
given to the public. But no detailed examination was made 
until recently. In the preparation of volume VIII, this series, 
a very detailed examination of every sample cutting was made, 
in order that a thoroughly reliable record could be built up 
and put into permanent form. 
It should be stated that beneath the Mississippian lime- 
stone is a great mass of calcareous sandstones and arenaceous 
dolomitic limestones. From the drill cuttings alone some- 
times it was difficult to determine just what names to use. The 
colomitic limestones were thoroughly crystallized, and were, 
therefore, composed largely of little granular crystals of dolo- 
mite, which were broken up by the drill, and strongly re- 
sembled sandstone cuttings. It was only by chemical and 
microscopical examination that they were distinguished from 
the sand grains. In fact, the sandstones and limestones grade 
into each other in such a way that scarcely a sample of the 
limestone could be found which did not contain water-worn 
sand grains, and scarcely a sample of sandstone could be found 
which did not contain variable amounts of calcium or mag- 
nesium carbonates. 
The last material passed through by the drill was a very 
hard, compact sandstone, which the drillers called granite. 
It proved to be a very interesting rock. Some of the samples 
of it carry a perceptible amount of feldspar, which increases 
its similarity to granite. Also, many of the samples are com- 
posed almost entirely of angular fragments of quartz, show- 
ing that the sand grains were cemented together by silica, 
producing a genuine quartzite which yielded angular frag- 
ments by the action of the drill bit. But all the way through 
rounded sand grains were present in sufficient quantity to 
preclude the idea that this material was granite or other 
eruptive rock. 
A number of well records follow, which may be read in con- 
nection with a study of the figures accompanying them. 
