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GEOLOGY OF CAPE BRETON.—GILPIN. 225 
Germany. The mineral may be much more common here than 
is supposed, as it might readily be mistaken for a limestone. 
Barytes. This mineral is largely used in paint making, and 
is found in Nova Scotia in at least two localities as a workable 
deposit, River John, Pictou County, and at Stewiacke. The 
River John mine is not being worked, but the Messrs. Hender- 
son & Potts, of this city, took last year a large amount of the 
ore from the Stewiacke mine. Mr. Fletcher reports the mineral 
as occurring in Pine Brook, Loch Lomond, but does not consider 
the deposit of much importance. I have noticed it in small 
veinlets, with fluor spar in a clayey limestone near the Sydney 
River Bridge. 
Building stones. As a rule Carboniferous measures of Cape 
Breton do not yield building stone of extra quality. Sandstones 
are quarried for local use at Margaree, Broad Cove, Cheticamp, 
Whyhogomah and Mabou. The limestone grit of Boularderie 
Island and Sydney Harbor yield a stone which is of fair quality. 
Generally speaking, however, the beds are too coarse, irregular 
in bedding, and frequently so impregnated with iron as to make 
them adapted principally for foundations and rough work. 
However, some of the upper beds of the limestone formation 
yield sandstones of firm and even texture, and good color which 
may be extensive enough to admit of regular quarry work. 
In the construction of bridges and culverts on the railway 
now being built across the Island, a considerable amount of 
limestone has been used from contractors’ quarries opened near 
the line. This rock when found in beds with suitabie division 
planes forms an excellent and durable building material. 
Several thousand cubic yards were used for this purpose last 
year. 
Oil.—A good deal of interest was shown in the so-called Lake 
Anslie oil fields a few years ago. This Jarge lake occupies a 
portion of an extensive basin of lower carboniferous measures, 
flanked on all sides by older strata. At numerous points in the 
vicinity of the lake, petroleum is found in cavities in the 
