CHAPTER V. 
DETAILED GEOLOGY. 
Outlying Areas. 
LEAD ores and zinc ores have been found in so many places 
in eastern Kansas that it would be improper to omit a discus- 
sion of conditions surrounding their occurrence. | 
PLEASANTON. 
At Pleasanton, where the most important ore bodies have 
been found, both lead ore and zinc ore occur in the Coal Meas- 
ure shales. Here there seems to have been some kind of a dis- 
turbance which produced a chimney-like space within which 
the shale was badly broken and opened up sufficiently to ad- 
mit ground water. The depth of this opening has not been 
determined, as mining has not progressed sufficiently deep. 
No one knows how deep shafting went during the first period 
of mining. During the second mining period, that of 18738, 
it is reported a shaft was sunk 250 feet, but no one watched 
it who was capable of judging the matter in hand, and conse- 
quently no information about the broken condition of the 
shale bodies could be obtained. In connection with mining 
done during the last period, 1900 to 1901, a shaft was sunk 
over 100 feet deep. Lead ore and zinc ore were found in the 
chimney-like area which constitutes a circle practically fifty 
feet across. Beyond this almost none was found. Quite an 
excitement sprang up, and numerous parties from Galena, 
Joplin and other mining centers came in and leased land and 
prospected either with the drill or by shafting. The pro- 
ductive center was entirely surrounded in this manner and 
all the included territory very well prospected, but nothing 
found elsewhere of any considerable value. 
What the exact nature of the disturbance has been and 
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