BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



VOL. 33, PP. 665-670 NOVEMBER 2, 1922 



DEVONIAN OF OKLAHOMA, WITH SPECIAL REFERENCE TO 

 THE ORISKANY AND CAMDEN FORMATIONS 1 



BY CHARLES SCHUCHERT 



(Read before the Society December 28, 1921) 



CONTENTS 



Page 



Introduction 665 



Oriskany of Marble City 666 



Oriskanian of Arbuckle Mountains 667 



Middle Devonian 668 



Chattanooga shale 669 



Section of the Devonian near Marble City, Sequoyah County, Oklahoma . . 669 



Introduction 



The various discoveries of the Lower Devonian formations in western 

 Tennessee were recounted by Dunbar in 1919. 2 In 1913 Weller and Mehl 

 announced before the Geological Society of America their remarkable 

 find of Helderbergian and Oriskanian faunas in the limestones of Sainte 

 Genevieve County, Missouri. This extended the known range of Oris- 

 kanian seas 500 miles, from southern Virginia to Missouri or from north- 

 ern Lake Huron to Missouri. The presence of Helderbergian in Okla- 

 homa has been known ever since J. A. TafFs description of it in 1902 in 

 the Tishomingo Folio of the United States Geological Survey, but far 

 more detail was given by Reeds 3 in 1911. The Oriskany, on the basis of 

 fossils, was, however, not clearly discerned by Reeds. Then came the 

 discovery of the true Oriskany in western Tennessee by Dunbar (Quail 

 and Harriman formations) in 1917, extending this sea 200 miles to the 

 southward; and now the announcement not only of the Oriskany, but as 



1 Manuscript received by the Secretary of the Society January 6, 1922. This paper 

 was read before the Society under the title "Oriskany of Oklahoma." 



2 C. O. Dunbar : Stratigraphy and correlation of the Devonian of western Tennessee. 

 Bull. 21, Tennessee Geological Survey. 



3 C. A. Reeds: The Hunton formation of Oklahoma. Amer. Jour. Sci. (4), vol. 32,»pp. 

 256-268. 



XLIV— Bull. Gfol. Soc. Am., Vol. 33, 1921 (665) 



