HORIZONS AND FOSSILS 



349 



Lcptwnarhomhoiclalis 

 fRafinesquina corrugata (3 :71) 

 Ficliuchcrtclla .wirplana var.? ^' 



Orthoceras sp. uov. 

 fCalymene clintoni 

 BolUaflata 



BREWERTON SHALE 



Erom the shales at Brewerton, which Hopkins (11: 7) calls "bluish" 

 and Burnett Smith (11:57) "olive," dredged out of the Barge canal, 

 Smith obtained (11:58) : 



Rusophycus MloM 

 PhoUdops squamifonnh 

 Atrypa reticularis 

 Pterinca cmaccrata 

 'Orthonota curt a'' 



Gomilaria sp. 

 Orthoceras sp. 

 Klcedenella symmetrica ( ?) 

 Arctinurus holtoni [var. nov.] 

 CaJymene sp. [clintoni] 



iVlthough we have already presented evidence that this fauna must lie 

 a long wa,y below the true Eochester shale (see figure 2) and scarcely 

 above the Williamson shale, yet it is mostly a list of Eochester shale spe- 

 cies in which Eusophycus and Orthonota curta are the only distinctly 

 Clinton components. It is entirely probable that more of the Eochester 

 species range downward into the Lower Clinton members than the lists 

 already given would betoken, but even so this fauna forges a further link 

 with that later congeries. Just how much of the shales overlying, or of 

 those in the adjacent wells, is to be referred to this faunal zone is uncer- 

 tain ; but we have rather confidently assigned here the 26 feet of fossilif- 

 erous shales just under the Kirkland limestone in the Lakeport column, 

 which terminate downw^ard with a black pebble seam. Much further 

 work is needed to determine the limits and areal extent of this division, 

 which is of great moment in the stratigraphic and faunal succession. 



KIRKLAND IRON ORE 



This is really a ferriferous limestone, conspicuously crinoidal, and is 

 known locally as the "red-flux bed." Its finest exposures are across the 

 town of Kirkland, in which lies Clintojii village, though it is traceable to 

 Steeles Creek (1:82), where it has furnished Crinoid joints (1:79, 

 figure 3), BcyricJiia? lata, Calyraene clintoni. On Swift Creek (1:84- 

 85) it or the associated rocks carry Leptcena rhomhoidalis, Rafinesquina 

 clintoni (1 : 84; R. ohscura of Hall, 3: 62). 



1* This species would appear to the writd' to be a ScheUwienella, as that genus is 

 defined by Weller in his "Mississippian Braqhiopods." It is not the species identified as 

 S. suhplana at Waldron, Indiana {8. hemia^er Winchell and Marcy). 



