GEOLOGY 



(Paper No. 32 was presented at the meeting of 1921. Papers 

 No. 33 to 39, 44 and 45 were presented in 1922. Papers no. 32, 33, 34, 

 35, 37, 38, 39, 40, 41, 42, represent the result of special in- 

 vestigations being carried on in various parts of the state by the 

 Oklahoma Geological Survey, and are published with the permission 

 of the director of the Oklahoma Geological Survey.) 



XXXII. EVIDENCE OF GLACIATION IN THE 



ARBUCKLE REGION (1) 



Samuel Weidman 



From the Oklahoma Geological Survey and the Department of 

 Geology of the University of Oklahoma. 



The deposits that are believed to have been formed either 

 directly or indirectly, because of glacial conditions during Pennsy- 

 Ivanian-Permian time include what has been referred to as the 

 Franks Conglomerate and other conglomerates of the same type. 



The Franks Conglomerate at Franks, the type locality, located 

 i)n the northeastern slope of the Arbuckle Mountains, consists of 

 several distinct beds of conglomerate each 100 to 350 feet in thick- 

 ness, interstratified with limestone, shale and sandstone. 



The lowest conglomerate bed at Franks, about 150 feet in 

 thickness, is at the base of the Penns3dvanian of the locality and 

 unconformably overlies the eroded edges of the pre-Pennsylvanian 

 formations. The beds of higher horizons, 100 to 350 feet in thick- 

 ness, are conformable with associated limestone and shale beds and 

 have the characteristics of intra-formational conglomerates within 

 the Pennsylvanian. The Franks conglomerate, therefore really 

 forms a series of conglomerate beds reaching from the base up to 

 higher horizons of the Pennsylvanian and probably into the basal 

 Permian. 



Whatever the correlation of these conglomerates, however, it 

 is their character and their probable origin to which attention is 



(l)Read at meetings of the Geological Society of America, 

 Chicago, December, 1921. See abstract of Bulletin G.S.A. Vol. 32, 

 p. 91. 



Read at the Tulsa meeting of American Association of Petro- 

 leum Geologists, March 17, 1921. 



