120 University Geological Survey of Kansas. 
propositions or claims put forward by him which may have 
been emphasized too much, and which it seems to the writer 
are misleading in part regarding the actual facts of occur- 
rence. While not wishing to engage in any controversy in 
the matter, nor to discredit in the least the value of the broad 
generalizations of Van Hise which are agreed with, as above 
expressed, the following facts may be pointed out. 
(a) It is probable that the Missouri-Kansas area does not 
contain as many nor as great faults and fissures as Jenney 
and Van Hise and Bain have claimed. LEarlier in this report 
this subject was discussed wherein it was shown that the 
movements producing fissures were of such a nature that a 
great stretching or elongation of surface resulted. This be- 
ing the case it follows that the fissures would be the greatest 
in extent at the surface, and would gradually decrease down- 
ward, which corresponds with Winslow’s statement of ob- 
served facts. It also corresponds with the geographic fact 
that almost all the ore bodies connected with the Ozark area are 
located around its periphery. ‘The only notable exception of 
this is the mining area about Aurora. West of this at Went- 
worth considerable mining has been done, and in all instances 
the farther away from the dome one goes the richer the 
mines are and the more general fractures are. By the radial 
movements which produced the uplift it is quite reasonable 
to suppose that an occasional fracture would be made near 
the summit, which in no way would interfere with excessive 
fracturing within the peripheral area. The excessive occur- 
rences of flint within the peripheral areas should be looked 
upon as a mere coincidence of lithologic and structural fea-- 
tures, but being so, and the flint being so easily fractured, it 
certainly has had a great influence in producing present con- 
ditions, and has permitted a much greater elongation of the 
surface where the flint fractures were so numerous than else- 
where around the periphery, and to a large degree accounts 
for the irregular position of ore bodies. It yet remains to be 
shown that these faults and fissures either have or have not 
any considerable depth. If the lithologic conditions of the 
strata concerned wielded little influence in their production 
then their origin lies in deeper seated conditions, which means 
