TITLES AND ABSTRACTS OP PAPERS 207 



DIAGNOSTIC CHARACTERISTICS OF MARINE CLASTICS 

 BY E. M. KINDLE 



CHARACTERISTICS OF CONTINENTAL CLASTICS AND CHEMICAL DEPOSITS 



BY ELIOT BLACKWELDEB 



SIGNIFICANCE OF SORTING IN SEDIMENTARY ROCKS 

 BY E. W. SHAW 



CHEMICAL AND ORGANIC DEPOSITS OF THE SEA 

 BY T. WAYLAND VAUGHAN 



PRESEJNTATiON OP PAPERS 



The first paper of the Society's regular program was iDustrated with 

 lantern slides and was discussed by Messrs. Grabau^ Bassler, Schuchert, 

 Perdue, and Ulrich. 



DEVONIAN AND BLACK SHALE SUCCESSION OF WESTERN TENNESSEE 

 BY CARL O. DUNBAE^ 



{AJ)stract) 



Along the western valley of the Tennessee River the Lower Devonian begins 

 with massive crystalline limestone of Coeymans age. The Decatur limestone, 

 generally assigned to the Silurian, seems to be of this time. The New Scotland 

 is represented by the well known and next higher Linden shale and limestone. 

 Succeeding the Linden is the remnant of a southward extension of the New 

 York Oriskany, for which the name Cypress Creek chert is proposed. This is 

 a white or yellowish chert carrying Spirifer- arenosus, S. arrectus, Renssekeria 

 ovoides, Plethorhyncha speciosa, Platyceras gehhardi, etcetera. 



The Cypress Creek is separated by a long time break from the Linden below 

 and by a lesser one from the Camden chert above. The Camden chert is, then, 

 very late Oriskany, and Savage's evidence that it goes unbroken into the Onon- 

 daga is thus corroborated. 



The Camden chert is followed by the Chattanooga shale of the early Kinder- 

 hookian, and this in turn by the fossiliferous Ridgetop shale of later Kinder- 

 hookian time. 



The next paper was presented extemporaDeously by the author and 

 illustrated by diagrams. Discussed by Charles Butts. 



STRATIGRAPHIC RELATIONS OF THE TULLY LIMESTONE AND THE GENESEE 

 SHALE OF NEW YORK AND PENNSYLVANIA 



BY AMADEUS W. GEABAU 



i Abstract) 



The Tully limestone is a calcilutyte, the material of which was derived from 

 the north, probably from coral or algal reefs which lay to the north of the 



Introduced by Charles Schuchert. 



