3O NEW YORK STATE MUSEUM 



The writer has before cited faunules from the Hudson valley 

 which contain the characteristic elements of the Canajoharie beds. 

 The most important of these is that from the Rural Cemetery of 

 Albany, whence Glossogr. quadrimucronatus mut. 

 cornutus was described. It is there associated with 



Mastigograptus circinalis Rued. 

 Corynoides calicularis Nicholson 

 Lasiograptus eucharis (Hall) 

 Diplogr. putillus (Hall) 

 Eopolychaetus albaniensis Rued. 

 Pontobdellopsis cometa Rued. 

 Leptobolus insignis Hall 

 Schizambon ? fissus var. canadensis^mi 

 Hormotoma cf. gracilis (Hall) 1 



This is one of the various upper subzones of the " Hudson River 

 shales " which in the former publications (op. cit. page 36) we have 

 referred to as an eastern development, characteristic of the Appa- 

 lachian trough, of the Utica shale. 



The belt of Canajoharie beds in the lower Mohawk valley is 

 abruptly cut off by the Hoffmans Ferry fault which, since the 

 eastern side has dropped, has buried all lower beds east of the 

 fault, under a belt of " Frankfort " shales and sandstones extend- 

 ing from the town of Galway in the north across the Mohawk river 

 to the foot of the Helderbergs. It becomes evident, however, from 

 the facts cited above, that the Canajoharie beds reappear from 

 under this thick mass of overlying " Frankfort " shales on the east, 

 along the Hudson, through the Taconic-Green Mountain folding 

 and they strike there according to this folding to the north-north- 

 east, as indicated by the outcrops at the Rural cemetery and at 

 Cohoes. 



The stations which we had cited in Bulletin 42 as representing 

 the Utica shale and forming a belt that passes through Albany, are 

 now mostly to be considered as Canajoharie beds, the same as the 

 occurrence at the Rural cemetery, and the few remaining like that 

 at Black creek, Voorheesville and the Vly at Voorheesville 

 (title 47, pages 531-33) are black shale zones intercalated in sand- 

 stones and correspond to the " Frankfort " rocks about Schenec- 

 tady. We must infer from these facts that typical Utica is not 

 represented in the Hudson River region but that the Canajoharie 

 shale is directly followed by the " Frankfort" (Schenectady) beds. 



1 See title 47, p. 528; title 60, p. 37. 



