1 8 NEW YORK STATE MUSEUM 



(title 44, page 463). Here in black, slabby calcareous shale were 

 collected (Mus. loc. 3765) : 



8 Climacograptus cf. putillus 

 Lasiograptus eucharis 

 Leptobolus insignis 



In a gully about one and two-fifths miles south by southwest 

 of Minaville a continuous section 255 feet thick is exposed, which 

 exhibits a complete transition from the typical lithologic character 

 of the " Utica " to that of the " Frankfort." This section has been 

 measured by Cumings and the following lithologic divisions dis- 

 tinguished : 



K4 Mostly covered. Thin sandstone and arenaceous shales 

 with a massive 2 foot layer at the base in the head of the 

 glen. 120' = 540' 



K3 Black shales becoming olive to blackish at the top. These 

 shales show a transition from the black calcareous shales of the 

 " Utica " to the arenaceous, thin, crumbling shales of the " Hudson 

 River " stage. 165' = 420' 



K2 Top consisting of slaty layers containing graptolites in 

 abundance. Black, even shale. 90' = 255' 



Ki Mostly covered, but showing brown in weathering, slabby 

 shale in the west bank of Chuctenunda creek, just above Mina- 

 ville. 165' =165' 



While Ki of this section has furnished the faunule cited under 8, 

 the following division K2 was found to contain still, at least in its 

 lower part (Mus. loc. 3770), specimens of 



9 Diplogr. (Mesogr.) mohawkensis 



Near the top (Mus. loc. 3769) a zone appears that is character- 

 ized by 



10 Climacograptus spiniferus (cc) 

 Lasiograptus eucharis 



K3 proved fossiliferous in one part (Mus. loc. 3768) where 



11 Climacograptus spiniferus 



occurs in great profusion. 



The shales in this division, although still carbonaceous and very 

 black like the " Utica " shale, do not any more react with HC1 and 

 are not calcareous. 



