NOTES ON MANGANESE ORES OF LOCH LOMOND.—GILPIN. 97 
at the eastern apex of a subordinate basin formed by transverse 
folding. 
Should further research show that at this point the seams 
referred to maintain their size, and extend in a form permitting 
of economic exploitation, the discoveries are of great importance. 
The search for similar seams may then reasonably be made at 
other points along the coal band, and certainly the areas of the 
Minas Basin coal field is large enough to allow a hope that in the 
future it may be added to the list of our productive districts. 
ART. I]—NoTES ON THE MANGANESE ORES OF LocH LoMOND, 
C.B. By Epwin Ginpin, A. M., F. G.S., F.R.S.C., 
Inspector of Mines. 
(Read 14th Jan., 1884.) 
For a number of years the presence of these ores in Cape 
Breton was recorded cnly by the mineralogist. Recently, how- 
ever, deposits of economic value have been found and worked, 
The ores of manganese occur, in Nova Scotia proper, in strata of 
Lower Carboniferous age, occupying a horizon low down in the 
Marine Limestone formation. The late Dr. How, in a paper 
read before this Institute some years ago, gave an interesting 
account of these minerals as they occur and are worked in Hants 
County. This evening I purpose merely to draw the attention 
of the Institute to their occurrence in Cape Breton, an interesting 
fact, as the knowledge of their presence in workable amounts in 
the Loch Lomond district will lead to a search for them in other 
parts of the Island. In all probability, the wide extent of the 
Cape Breton Limestones will before long afford several localities 
containing deposits worthy of the miner’s attention. My notes 
are from a visit to the mine, and from information kindly 
furnished me by Mr. Fletcher, of the Geological Survey of Canada, 
who made a detailed survey of this district summer before last. 
The geological features of this part of Cape Breton are repre- 
sented by a band of millstone grit extending from Mira River, 
