'_'">•; ('. . I. Reeds — Hunton Formation of Oklahoma. 



Akt. XXXI. — The Hunton Formation of Oklahoma: by 

 Chester A. Reeds, Bryn Mawr College. 



[Contributions from the Paleontological Laboratory of Yale University.] 

 Introduction. 



The Hunton formation of the Arbuckle Mountains, Okla- 

 homa, was briefly described by Mr. J. A. Taff in the Atoka 

 Folio, 1902, Tishomingo Folio. 1903, and Professional Paper 

 No. 31, 1901, of the IT. S. Geological Survey. Drs. G. H. 

 Girty and E. O. Ulrich collected and studied fossils in connec- 

 tion with the stratigraphic work of Taff. 



Since 1905 the writer has examined with care all of the 

 widely scattered outcrops of the Hunton. He has made, fur- 

 thermore, three large collections of fossils from these beds, and 

 has measured as many as 35 sections across the exposed edges 

 of these tilted strata. After the completion of a comprehen- 

 sive study of the collections and sections under the direction of 

 Professor Charles Schuchert of Yale University, the writer 

 prepared a paper entitled " The Stratigraphy of the Hunton 

 Formation, with introductory chapters on the Physiography 

 and Structure of the Arbuckle Mountains, Oklahoma." This 

 report was submitted May 1, 1910, to the Faculty of the 

 Graduate School of Yale University as a thesis, in partial ful- 

 filment of the requirements for the degree of Doctor of Phi- 

 losophy. The introductory chapters on the Physiography and 

 Structure together with chapters on the Stratigraphy and 

 Mineral Resources of the Arbuckle Mountains have since been 

 published as Bulletin No. 3, 1910, of the Oklahoma Geological 

 Survey. 



In the following pages the writer proposes to submit only a 

 summary of his stratigraphic and paleontologic studies of the 

 Hunton, since the text and illustrations of the complete report 

 will be published later as one of the U. S. Geological Survey 

 publications. 



As no maps accompany this article the writer refers the 

 reader to the Ardmore, Tishomingo, Atoka and Stonewall 

 topographic sheets, the Atoka and Tishomingo Folios, the map 

 of the Arbuckle Mountains in Professional Paper No. 31 of 

 the U. S. Geological Survey, and to the maps accompanying 

 Bulletin JNo. 3 of the Oklahoma Geological Survey. 



Problem stated. — As mentioned in the Tishomingo Folio, 

 page 4, and Professional Paper No. 31, pages 29 to 30, the 

 Hunton limestone may be divided into two categories : (1) litho- 

 logically, into 3 members: a basal limestone, a middle shale 

 and an upper limestone ; (2) paleontologically, into 4 faunal 



