92 THE UNIVERSITY OF OKLAHOMA 



tion into four new formations on lithologic and fauna! characters. 

 The four new formations he named Chimney Hill limestone and 

 Henryhouse shab of Silurian age, and Haragon shale and Bois 

 'dArc limestone of Lower Devonian age. 



A progress geologic map of the state was printed by Mr. C. W. 

 Shannon in 1916 to accompany part two Bulletin XIX, but no 

 changes of importance were made in tlio Arbuckle Mountain area. 

 In 1917 on a geologic map of Carter county, some changes in dis- 

 tribution of formations were made northeast of Woodford, anJ 

 yet at that time the true nature of the structure in that region was 

 apparently not appreciated. 



In 1921 R. C. Moore in Vo'.ume V. No. 1 of the Bulletin of the 

 Amicrican Association of Petroleum Geologists, gives a small scale 

 geologic map of the Arbuckle mountains and adjacent areas and 

 several structure sections. His map of the Pennsylvanian of the 

 Mid-Continent and correlation of different parts of the Pennsyl- 

 vanian scries is very helpful. In one of the larger problems of the 

 area, he follows McCoy's unpublished statement that the Franks is 

 identical with the Seminole cong'.omerate. 



In 1921 the western part of the geologic map of the Arbuckle 

 mountains was used by W. L. Goldston, Jr., as a part of his map 

 of the Glenn formation, but the part covering the Arbuckle moun- 

 tains was practicahy the same as that made by Ta.f in i9J4. 



Thus we see that comparatively little change has been made in 

 the geologic map of the Arbuckle mountains smce the early one b}^ 

 Taff. The work done at that time in differentiating and locating 

 formations was excellent, but of necessity it was somewhat general- 

 ized as il'ustrated by the Hunton, which was described as one for- 

 mation v^rhich later has been divided into four separate formations 

 with distinctive characteristics. Until the present, no attempt has 

 been made to show these on a map as separate formations. Ac- 

 cordingly, there is need for a new detailed map giving the distribu- 

 tion of these formations. Another way in which the older map is 

 generalized, is in the location of contacts between formations ; some 

 of these contacts being a mi'.e or more away from the proper loca- 

 tion. Also, there is need of greater detail and accuracy in represent- 

 ing the structure of the mountains. For instance a great transverse 

 anticline named by the writer the "Plateau Anticline," has apparently 

 never been recognized. Furthermore, there is need of reinterpreta- 

 tion of some of the structures previously mapped. Thus the struc- 

 ture near Woodford which has been mapped as a fault, and on 

 casual observation looks like a fault with a horizontal displacement 

 of lOCO feet or more, but as the result of critical study this struc- 



