IRON ORES OF THE CLINTON FORMATION 27 



evidence exists that a part of the upper 1>ecls hitherto assigned to 

 the formation may belong to the age of the Rochester shale. 



The section at this locality, as given by C. H. Smyth jr,^ is as 

 follows : 



STRATA FEET 



Calcareous sandstone, thin shale layers 50+ 



Ore, red flux 6 



Calcareous sandstone . 6 



Blue shale, thin sandstone layers 15 



Ore, oolitic 2 



Shale 2 



Ore, oolitic i 



Blue shale, thin sandstone layers 100+ 



It is manifest that the formation here assumes a lithic character 

 that is quite different from the succession heretofore described. 

 Above the upper calcareous sandstone there is a gap of undetermined 

 extent before the Lockport is reached. In the sections to the east, 

 occurs a heavy gray sandstone, 70 feet thick as a maximum, form- 

 ing what has been considered the uppermost member of the Clinton. 



Herkimer county. The eastern end of the Clinton belt crosses 

 southern Herkimer county into Otsego county. The relations in 

 this region are not well known, and it is impossible as yet to fix 

 accurately the bounds of the formation. The following sections 

 from HalF show the details of the succession so far as established. 



Near the boundary of the towns of German Flats and Warren 

 the strata are exposed along- Mat creek. This locality is referred 

 to by Hall as Tisclale's mill. 



STRATA FEET 



Gray sandstone, upper termination of formation 60 



Shale 2 



Sandstone and shale with iron ore 20 



(jreen shale with arenaceous matter, pebbles etc 25 



Coarse sandstone, with much shaly matter 10-15 



Green shale with fucoids ? 



The Oneida conglomerate below was r.ot observed by Hall, but 

 its presence both here and in the vicinity has boon detcrmine<.l by 

 one of the writers (C. A. 11.). The ore can not bo soon in i)laco. 

 though it occurs as Heat in the creek boil. It is of oolitic character. 



» In Kemp's Ore Deposits of the United States. 1895. p. 104. 

 -' Palaeontology of Nlw York. 1S5J. 2:1$ ct sc<]. 



