File:Annual report (1920) (14778647972).jpg

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English:

Identifier: annualreport192000onta (find matches)
Title: Annual report
Year: 1891 (1890s)
Authors: Ontario. Dept. of Mines
Subjects: Mines and mineral resources
Publisher: Toronto
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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ow aphanitic bands which exhibit transverse shear-cracks. The coarser partis essentially a gneissoid mica-hornblende gabbro, and consists of sericite with kaolinrepresenting the original feldspar (labradorite), hornblende, biotite, and quartz,while the narrow bands are more silicious. The accessory minerals are titaniferousmagnetite and pyrite. This island seems to represent an intrusion, largely confinedto this locality, whose relations to surrounding rocks were not determined. Thegneiss on the island is traversed by dikes of two different kinds, one a hornblendc-biotite granite, and the other a mica diorite of coarse grain. The relations ofthese dikes to one another were not evident, but the granitic dike probablyindicates that the older gneiss, which it intrudes, is pre-Laurentian and may beprovisionally assigned to the Keewatin series. * Essential mineral constituents of rocks are named throughout this report in the orderof their abundance in the rock. 166 Deoartment of Mines No.4
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1920 A Qeoloffical Reconnaissance into Patricia 167

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Author Ontario. Dept. of Mines
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(Reusing this file)		 At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Volume
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1920
Flickr tags
InfoField
  • bookid:annualreport192000onta
  • bookyear:1891
  • bookdecade:1890
  • bookcentury:1800
  • bookauthor:Ontario__Dept__of_Mines
  • booksubject:Mines_and_mineral_resources
  • bookpublisher:Toronto
  • bookcontributor:Gerstein___University_of_Toronto
  • booksponsor:University_of_Toronto
  • bookleafnumber:179
  • bookcollection:gerstein
  • bookcollection:toronto
Flickr posted date
InfoField
29 July 2014



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