262 ALEX. W. McCOY 



5. The amount of oil in any field could have been derived 

 from normal bituminous shales in close proximity to the pay 

 horizon. 



6. These five statements also lead to another general conclu- 

 sion, that areas of maximum differential movement are in accord 

 with anticlinal structures. It has been noted from a study of 

 the majority of pools in the mid-continent field that the maximum 

 sub-surface faulting is found on the flanks and sides of the anti- 

 clines, and that the best production runs in trends parallel to 

 the faulted zones. It has also been noted in a number of cases 

 that production which is not related to marked anticlinal or dome 

 structure bears the same close relation to sub-surface faults.^ 



The author is indebted to many co-workers in the sub-surface 

 branch of the geology department of the Empire Gas and Fuel 

 Company, who have diligently collected and compiled information. 

 Especially is acknowledgment made to Mr. Gerald E. Moser for 

 the diagrams in this paper; to Mr. E. A. Trager for aid in the 

 experiments; to Dr. L. C. Snider for suggestions and criticisms 

 in the work; and to Mr. Everett Carpenter, whose advice and 

 counsel have made the investigation possible. 



^ Detailed data for the basis of tliese statements are necessarily considered con- 

 fidential and cannot be published at this time. It is hoped that this material may 

 sometime be available so that a paper discussing the details of various producing 

 structures can be published. 



