 | Sir John William Dawson - 1855 - 498 pagine
...however, of small magnitude, and I am not aware that they are in any place of workable dimensions. In addition to these veins of iron ore, conformable beds, as already mentioned, exist in the Devonian slates, and have been opened at Moose river, Nictau, and the East river of Pictou, at the... | |
 | Geological and Natural History Survey of Minnesota - 1891 - 538 pagine
...shattered quartzlte and slate are penetrated in every direction by slender veins of micaceous specular ore. In addition to these veins of iron ore. conformable...Silurian slates, more especially on the East. River of Plctou, at the locality indicated on the map. At this place one bed appears to be forty feet thick,... | |
 | Newton Horace Winchell, Horace Vaughn Winchell - 1891 - 546 pagine
...shattered nuartzite ami slate are penetrated in every direction by slender veins of micaceous specular ore. In addition to these veins of iron ore. conformable...Silurian slates, more especially on the East River of IMctou, at the locality indicated on the map. At this place one bed appears to be forty feet thick,... | |
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In many places extensive masses of shattered quartzlte and slate are penetrated in every direction by slender veins of micaceous specular ore. In addition to these veins of iron ore. conformable beds, as already mentioned, exist in the upper Silurian... 