Abstract

Introduction

The work of the Geological Survey of Canada during the past ten years, in the region north of Lake Superior extending westerly from Timiskaming subprovince to Rainy Lake, has shown that the stratigraphic succession for this subprovince may be expressed as follows :

Table of formations

Kaministikwia group (upper copper-bearing series of Logan). (Granite intrusive.)
Osler series.
Sibley series.
Animikie series. 
Great unconformity. 
Basement complex : Batholithic intrusives.
Series based by a granite-pebble-bearing conglomerate 
Unconformity. 
 Batholithic intrusives (not positively identified in the field). 
 Volcanic complex.
Sedimentary, mica-schist assemblage. 
Kaministikwia group (upper copper-bearing series of Logan). (Granite intrusive.)
Osler series.
Sibley series.
Animikie series. 
Great unconformity. 
Basement complex : Batholithic intrusives.
Series based by a granite-pebble-bearing conglomerate 
Unconformity. 
 Batholithic intrusives (not positively identified in the field). 
 Volcanic complex.
Sedimentary, mica-schist assemblage. 
Basement Complex

Throughout the subprovince there are extensively developed batholithic intrusives. These are the youngest rocks of the Basement complex which have been recognized. The granites which make up a part of the assemblage mapped as Batholithic intrusives are massive, except in the vicinity of local faults, and there is no evidence that they have been affected by regional pressure since they solidified. Around the granites there . . .

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