Gregory/) SLATES AND SCHISTS. 145 
that these bowlders may have been carried out in the Paleozoic sea by 
the ice and deposited as we now find them. The various cleavages 
found in the slates have not affected the igneous blocks. 
The other outcrops found in this township, and also in Masardis, are 
sandy slates and fine micaceous or feldspathic sandstones, with occa- 
sionally a limestone bed. West of Masardis the beds are sparingly 
fossiliferous. 
MANGANIFEROUS IRON SLATES. 
In his second report Dr. Jackson 1 described at considerable length 
beds of "compact red haematite" found on the Aroostook River in 
what is now the southeast corner of Wade Township. The analysis 
made at that time showed 76.80 per cent of peroxide of iron, and the 
calculated amount of iron in sight at this outcrop was 97,200 tons, and 
i connection between this bed and the one near Woodstock, New 
Brunswick, was assumed. 
Besides the locality described by Dr. Jackson, outcrops of this 
nanganese-bearing iron slate were found on Dudley's farms, in south- 
east Castle Hill, and on the State road half a mile west of the Mapleton- 
Jastle Hill line. Similar slates, containing less iron, occur also in 
vVoodland and New Sweden. In all these cases the ore occurs as stains 
>n slate, which is interbedded with the ordinary slated limestone of 
bis region, and the ore varies in amount from a faint reddish stain to 
mall areas of iron and manganese oxides quite free from calcareous 
tnd siliceous matter. In the Castle Hill outcrops the ore occurs as 
lattened pellets between the finely divided slate layers (see PI. 
BODE, B). The position of the five known outcrops of this slate is on 
, line which has nearly the direction of the general strike of the 
imestone. 
1 Second Rept. on Geology of Public Lands, pp. 37 et seq. 
Bull. 165 10 
