TITLES AND ABSTRACTS OF TAl'ERS 159 



ORDOVICIAN STRATA BENEATH THE HEALDTOy OIL FIELD, OKLAHOMA 



BY SIDNEY POWERS^ 



{Abstract) 



The Healdton oil field in the western portion of Carter County, southern 

 Oklahoma, is situated in "Red Beds" of Permian age, 12 miles from the 

 Fennsylvanian strata which border the Arbuckle Mountains. The oil in the 

 Healdton field occurs largely in Permian sands near the base of this formation, 

 but it may have been derived, according to Wegemann and Heald (United 

 States Geological Survey, Bulletin 621, page 26), from underlying Pennsyl- 

 vanian or older rocks. In the Loco gas field, Stephens County, Fennsylvanian 

 fossils have been found in drill cuttings, indicating that the pronounced uncon- 

 formity of the Permian with the older Paleozoic strata which exists around 

 the Arbuckle and Wichita Mountains and the Criner Hills extends beneath the 

 Red Beds of southern Oklahoma. 



Fossils from the Hammon and Colcord well number 11, center section 15, 

 township 4 south, range 1 west. Carter County, "shot" from a depth of 1,275 

 to 1,300 feet, and from the Producers Oil Company well number 11, on the 

 eastern side of the southeastern quarter of the same section, at a depth of 

 1,550 feet (under-roming specimens), have been identified by Dr. E. O. Ulrich 

 of the United States Geological Survey as of Ordovician age. 



Pronounced unconformities must exist beneath several of the southern Okla- 

 homa oil fields in order to account for the pre-Permian rocks at Healdton 

 and Loco and to account for variations in the well logs. 



Presented in abstract extemporaneoiish^ 

 Brief remarks were made by Dr. I. C. White. 



At this point the reading of papers was discontinued until the follow- 

 ing morning, 



PrtESIDENTIAL ADDTJESS 



At 8.15 o'clock Thursday evening tliere was given in Chancellor's Hall 

 the public address of the retiring Piesident entitled 



THE PHILOSOPHY OF GEOLOGY AND THE ORDER OF THE STATE 

 PRESIDENTIAL ADDRESS BY JOHN M. CLARKE 



The address is prhited as pages 23r)-248 of this volume. 



At tlie close of the lecture opportunity was given to visit the Museum, 

 and most of the members later attended tlie smoker given at the Uni- 

 versity Club. 



Introduced ])y J. E. Wolff. 



