92 . NEW YORK STATE MUSEUM 



Several other localities in the vicinity of North Hillsdale possibly 

 warrant brief mention because of the manner of occurrence. 



On another of Joseph Goodsell's farms, now occupied by Henry 

 Duff, a negligible amount of bog manganese has been accumulat- 

 ing in an irregular bog about one-half of a mile north of the farm 

 in a small depression in an open pasture west of the road. The 

 location of this bog is near the 1200-foot contour and in a schist area. 

 The accompanying diagram (figure 3) illustrates the essential 

 features of the occurrence. The manganese content is probably low, 

 as can be seen by referring to the analysis on page 95. Wad is 

 found more or less evenly distributed throughout an area of 2460 







Nodular 

 ! Wad 



^> ' 





(* \ 

 1 *l 



L / / 



* / 



Sk. I 

 afc. * ( 







*- 





-^L— * 





1 







V * \ 







1 

 1 







\ sL\ 





St 



1 



wad 







\ *■ 1 I 



i 



I 



too 









i 





. 









1 



Fig. 3 Henry Duff manganese bog, Hillsdale, N. Y. 



square feet to the depth of 1 foot. By allowing 50 per cent of the 

 area to consist of bog manganese in the form of nodules, the other 

 part taken up largely by boulders and clay, the estimate of approxi- 

 mately 125 tons is made. 



An interesting locality 2 miles northwest of North Hillsdale was 

 found in the middle of the road where the overflow from a roadside 

 marsh crosses the road to lower ground on the other side. This 

 occurrence consisted of a nodular aggregate pavement of wad, the 

 writer's attention being called to it by the dark manganiferous 

 nodules, looking much like a conglomerate consisting of dark pebbles 

 in a whitish cement. Neither in the bottom of the bog, in the brook, 

 nor on the land adjacent to it, was the writer able to find signs of 

 any more bog manganese. 



