HawortH.| Detailed Geology of Oil and Gas. 175 
arches have been worn away, leaving the west limbs only. 
South of the state line the anticlinal regions probably become 
a little more noticeable and doubtless have a little greater in- 
fluence. Such a one evidently passes Bartlesville and coincides 
with the line of gas-wells east of Bartlesville. Probably, also, 
there is a wave-crest west of this closely paralleling the 
boundary between Cherokee and Osage Indian lands. In Kan- 
sas we have such gentle waves both east and west of Chanute 
reaching for miles in nearly a north and south direction, and 
the wonderful gas-wells a few miles west of Chanute are along 
the summit of such an anticlinal ridge, while the oil-wells and 
gas-wells lying east likewise are along the summit of a very 
mild anticline. 
In a number of places in the state anticlinal arches with 
gentle dips have been found with directions differing from 
those named. North of Fort Scott a short distance such an 
one exists, and for more than ten years the writer has tried to 
prevail upon prospectors to drill wells along its summit, but 
thus far without success. Farther west, at Elmdale, and proh- 
ably reaching all the way from Elmdale to Arkansas City, an 
anticlinal ridge exists which is moderately productive at EKlm- 
dale, Augusta and Arkansas City. The discovery of gas at 
the latter place, so far as known to the writer, was accidental. 
At Elmdale, however, a member of the State Geological Sur- 
vey, Dr. J. W. Beede, pointed out the anticlinal ridge to some 
of the business men of that place, with the result of a nice gas- 
pool being uncovered. 
Emphasis, therefore, should be placed upon the statement 
that anticlines of themselves do not produce gas or oil. Prob- 
ably we have thousands of unproductive anticlines in America 
for every one that is productive. A mere anticline of itself 
is of but little importance. First, there must be a proper 
accumulation of sand or other material to produce a porous 
rock into which oil and gas may be foreed after being manu- 
factured in nature’s laboratory. Next, the oil and gas must 
have been made and forced into such a porous rock; and lastly, 
the anticline made must have coincided with these other two 
conditions. If one is in an area known to be liable to contain 
oil and gas beneath the surface, the prospector should seek out 
anticlinal ridges, which may be detected by the position of the 
stratified rock at the surface. If he is fortunate enough to find 
. such a structure, he should prosecute his prospecting along such 
