File:Excursions (1914) (14778548011).jpg

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Identifier: excursions07cana (find matches)
Title: Excursions
Year: 1914 (1910s)
Authors: Canada. Commission géologique
Subjects: Géologie Ressources minérales
Publisher: Ottawa : Imprimerie du gouvernement
Contributing Library: University of Ottawa
Digitizing Sponsor: University of Toronto

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Text Appearing Before Image:
érie Grenville, dont la position dans la classi-fication adoptée par le Comité International est assezincertaine. On y trouve également une série importantede sédiments plus anciens que le Laurentien que des tra-vaux récents ont fait ranger au-dessous du Huronien etquon a appelés provisoirement la série Sudbury. La classification admise récemment pour le Précambriende la région de Sudbury, est la suivante : Post-Keweenawien (?)—Dykes de diabase et granit. Keewaninawien (?)—Nappe éruptive nickelifère. Huronien—Huronien supérieur (Animikie), conglomérats,tuffs, ardoises et grès.—Huronien moyen (absent).—Huronien inférieur, conglomérat de base. Laurentien—Granité et gneiss, se faisant jour à travers lesroches anciennes. Série Sudbury—Arkose de Copper Cliff, grauwacke de Mc-Kim et quartzite du lac Ramsay. Keewatin—Formation ferrifère, greenstones et schistesverts. Série Grenville—Quartzites, schistes à sillimanite, gneisset calcaires cristallins.
Text Appearing After Image:
15 Il est difficile de dire si les séries Keewatin et Grenvillesont du même âge, attendu quon na jamais trouvé en con-tact les deux groupes de terrains. Comme on na jamais trouvé de roches fossilifères, lasituation dans le temps des roches éruptives est un peuincertaine. GÉOLOGIE DE SUDBURY. La ville de Sudbury est construite en grande partie surdes argiles stratifiées reposant elles mêmes sur un sablemouvant, provenant de lancien fond du lac glaciaireAlgonquin, mais de place en place des collines rocheusesse font jour à travers ces dépôts lacustres et montrentleurs sommets arrondis et polis par les glaciers Pléistocène.La roche quon rencontre surtout dans la ville est un £rau-wacke de Mckim très bien stratifié. Sur les surfaces al-térées on voit distinctement différentes couches mincesdardoise. Généralement les couches sont très redressées etmême buttent verticalement contre un massif laccolithiquede gabbro qui apparaît dans le quartier est de la ville. Lad

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https://www.flickr.com/photos/internetarchivebookimages/14778548011/

Author Canada. Commission géologique
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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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7
Flickr tags
InfoField
  • bookid:excursions07cana
  • bookyear:1914
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Canada__Commission_g__ologique
  • booksubject:G__ologie
  • booksubject:Ressources_min__rales
  • bookpublisher:Ottawa___Imprimerie_du_gouvernement
  • bookcontributor:University_of_Ottawa
  • booksponsor:University_of_Toronto
  • bookleafnumber:19
  • bookcollection:universityofottawa
  • bookcollection:toronto
Flickr posted date
InfoField
30 July 2014


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current12:01, 27 March 2016Thumbnail for version as of 12:01, 27 March 20162,832 × 1,798 (1.68 MB)SteinsplitterBot (talk | contribs)Bot: Image rotated by 90°
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