568 F. G. CLAPP CLASSIFICATION OF PETROLEUM AND GAS FIELDS 



and the oil still lower on its flank. Another example^ after Arnold, is 

 shown in fignre 7. :,: 



General iHscas^ioii. — The question arises whetlier to use the wclJ known 

 term ''monoeline" or the reeently sugg-ested one, 'liomocline." We find, 

 on consulting A\\'l)slerV New International Dictionary (11)10}, that 

 homocline does not appeal-, while monocline is defined as "having, or 



Scale of Miles 



6 Productive Oil Weil 

 <> Show of Gas 



■i;^ Productive Gas Well 



4- Unproductive Wei I (dry ^io!e) 



^ Show • 

 o Weil b 



FiGURE 8. — Structure Map of Gas Pool in Clinton Sand near Wooster, Ohio 



Showing occurrence on a monoclinal nose according to Subclass III (a). Contour interval, 



10 feet. (After C. A. Bonine; in Bulletin 621-H, U. S. Geological Survey, 1915) 



pertaining to, a single oblique inclination; as, amonoclinalfold or flex- 

 ■ure.':^ A monoclinal flexture. as distinguishedfrom a fold is defined, 

 quoting from W. B. Scott, as "a single, sharp bend connecting strata 

 -which lie at different levels and are. often horizontal excepting along, the 

 line of .flexure.^^ ■ A monoclinal fold, therefore, is any obliquely inclined 

 series of strata dipping entirely in one general direction. 



