350 G. H. CHADWICK— STRATIGRAPHY OF NEW YORK CLINTON 

 VANHOBNSVJLLE SA^^DSTONE 



Though the exposures of this red, coarse hematite-quartz mixture at 

 Vanhornsville (1:80, 81; 3:15) are meager, the rock itself is indubita- 

 1)le and strikiBg. Its possible equivalency has been already mooted. 



From the "shaly laminated sandstone highly charged with oxide of 

 iron, associated with the iron-ore beds in the town of Kirkland'^ (3 : 64), 

 Hall gives : 



Leptcena rhomhoidalis (1 :86) Whitfieldellaf sp. (3 :78, Tl. 24, f. 5) 



Raftnesquina cUntoni (ohscura) Ptcririea emacerata 



Strophomena? orthididea Diaphorostoma sp. 

 Stroplieodonta prisca 



This fauna can scarcely lie lower than the Brewerton, wliile tlic rock 

 suggests a westward extension of the Yanliornsville. 



From about the same horizon came probably the tyj)es of ''Palceopliy- 

 cus" (EopJiyton?) striatum, and perhaps also ''Ortliis" tenuidens. 



PHCENIX OR 8CHRCEPPEL SHALE 



The type locality is at Phoenix, on the Oswego River, where Burnett 

 Smith (11: 57, 58) obtained the following faunule: 



Chasmatopora angulata Kionoceras suhcancellotum 



Leptcena rhomdoidalis Dawsonoccras amcricannm 



Plectaml>onites transversalis r f hocer a s sii. 



Atrypa reticularis afftnis Calymcne sp. 



Spirifer (Eospirifer) radiafus DalmmiitcsJimulurus 

 Pterinea emacerata 



From the proximity of the Lockport limestone at Three River Point 

 (11:9), and of the lower Rochester shale nearly due east of Phoenix, 

 this is high up in the Clinton group, to which its olive color assigns it. 

 The rifts in the river (1: 89) indicate a firmer rock-mass than that at 

 Brewerton, such as the upper C2 feet of Clinton shale in the Lakeport 

 well with its intercalated sandstones, Avliich again is connected l)y numer- 

 ous outcrops (1: 89, 272, 87) with the upper sandy layers at Clinton and 

 Utica. These last localities supply the following additional forms: 



Rusoi)hycus hiloha Linfjulataniola {o:^^) 



Palceophycus hacieriion, iiom. iiov. h'afl'ncsquina clintoni {ohscura) 



GonosticJms? circnlus, nom. nov. ''Stcnoscisina" sp. (1 :89) 



Aristophycu s ? f sp. ( 3 : PL 10, f . 5 ) fPentamerus ovalis 



Palwocychis rotnloidcs ? Diaphorostoma sp. 



Westward the sandy layers at this liorizon drop out and then thin limy 

 ones come in, increasing until finally the division seems to merge into the 



