REPORT OF THE DIRECTOR 1917 



95 



can be accounted for by the high content of iron. Figure 4 illustrates 

 the occurrence. Upon following the brook west from this outlet, a 

 small deposit, of nodular wad is found at the debouchure of the small 

 brook in the swamp below. The proportion of manganese in the 

 main bog is, according to analysis, 12.20 per cent. By a conservative 

 estimate the bog manganese in this occurrence is about 300 tons. 



On the estate of R. H. Girdler, situated about 1 mile south of 

 Canaan Center, a small occurrence of nodular bog manganese was 

 discovered in the summer of 191 7. The manganese for the most 

 part is in the form of nodules, nodular aggregates and as a cement for 

 the underlying consolidated hardpan. A section from the trench 

 reveals 12 inches of brownish yellow clayey loam with abundant 

 nodules and occasional nodular aggregates, 28 inches of consolidated 

 hardpan with occasional boulders and rock fragments cemented by 

 manganese dioxide, in a matrix of whitish clay overlying a non- 

 manganiferous consolidated hardpan. Figure 5 illustrates this 

 deposit. 



In an area of 5000 square feet adjacent to the outlet stream and 

 outlet portion of the bog, it is estimated that about 300 tons of 

 manganese mav be found. 



In several other localities on the terracelike benches and divides 

 of Shaker mountain traces of nodular manganese were found in 

 marshy places overlying and adjacent to schist, slate and grit areas. 



Chemical analyses 



Locality 



Mn 



Fe 



P 



Ba 



Gott-Mesick Bog, Spencertown, N. Y 



J. Goodsell, Hillsdale, N. Y 



20.78 

 22.33 

 21 . 16 

 12.20 



15-31 



.04 



.14 



F. Palmer, North Hillsdale, N. Y 



D. Parsons, Canaan, N. Y 









No attempt has been made to make an exhaustive analysis of the 

 samples. Doubtless the iron would average about the same in the 

 other localities as in the Gott-Mesick bog and the same might be 

 inferred for the phosphorus and barium. The analyses and the 

 clay associations of the manganese would lead us to think that the 

 silica content is very high. The blackest of the manganese bogs, 

 that of J. Goodsell, seems to contain the highest percentage of 

 manganese as well as the highest tonnage. 



