Hornepayne-Longlac Section, Ontario 
"THE area covered by this map has up to the date of writing had very little surface prospecting, especially 
by good prospectors. From explorations it would appear that the most likely economic gold section is 
north west of McKay Lake. It is not improbable that, in the yet unexplored sections, where diabase dikes cut 
the volcanic eruptive formations, silver ore may be found, especially if conglomerates are located in the vicinity. 
The occurrence of graphite in the vicinity of Taradale and elsewhere may have more of an economic meaning 
than would appear on the surface because, throughout the Port Arthur silver district, graphite is one of the 
important nate elements in the ore, differing in that respect from the Cobalt ores. 
Ore outcrops cannot be expected to be as frequently met with in this section north of Lake Superior as 
on some other places along the “height of land.” The lava flows north of Lake Superior are the greatest 
known. The piling up here of billions of tons of igneous formation and the consequent depression in the 
earth’s crust where Lake Superior now exists, is doubtless the reason that this is the greatest fresh water lake 
in the world. Secondary intrusions could not everywhere have had an effect through to the surface on these 
tremendous cooled masses of lava flows which become coarser in texture and are trap rock south, south-east 
and south-west of Lake Nipigon. Where, favoured by lines of structural weaknesses such as is so pronounced 
at Michipicoten Harbor, and continuing eastward to the Goudreau camp, also on the “height of land,” deposi- 
tion did occur, it is found more concentrated, with rich values. The “height of land” range then swings 
north-west for eighty miles, crossing and paralleling the Canadian National Railways between Hornepayne 
and Longlac Stations. Then it swings south again to Schreiber, where the McKellar-Longworth is likewise 
favored by rich veins with concentrated values. 
The country is partly covered with drift where the railway crosses and recrosses the “height of land” and 
is often well suited in many places to surface prospecting on account of the small short timber growth. This, 
together with the fact that it is not in any timber reserve, affords the advantage, that permission to work 
should be granted without the delay which has held up very many promising mining sections until the com- 
mercial timber has been removed. As it is along the “height of land” that the other mining fields of note are 
located, this area is worth exploration and prospecting, especially as it is adjacent to Canadian National main 
line transportation facilities. 
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