. The Canadian record of science. Natural history; Science. 474 Canadian Record of Science. a complicated series of rocks of unknown origin, but com- prising a considerable amount of intrusive material. He- regards it as either the remains of a primitive crust pen- etrated by much igne- ous matter, or as a series of altered rocks older than the Gren- ville Series, and formed under differ- ent conditions. In any case it seems to- wan t the evidences of ordinary aqueous de- position presented by the limestones, iron- stones, quartzite, and schists of the Gren- ville Series. Similar views were ad
. The Canadian record of science. Natural history; Science. 474 Canadian Record of Science. a complicated series of rocks of unknown origin, but com- prising a considerable amount of intrusive material. He- regards it as either the remains of a primitive crust pen- etrated by much igne- ous matter, or as a series of altered rocks older than the Gren- ville Series, and formed under differ- ent conditions. In any case it seems to- wan t the evidences of ordinary aqueous de- position presented by the limestones, iron- stones, quartzite, and schists of the Gren- ville Series. Similar views were advocated in my address on the " Geological History of the Atlantic," be- fore the British Asso- ciation, in Fig. 1.—Distribution of Grenville Limestone in the district north of Papineauville, with section showing arrangement of the beds. Scale of map 7 miles to an inch. (See also Dr. Bonney's- paper, Geological Magazine, July, 1895, p. 295.) Dotted area : Limestone. Horizontal lines : Upper gneiss (fourth gneiss of Logan.) Vertical lines : Lower gneiss (third gneiss of Logan.) Diagonal lines : Overlying Cambrian and Cambro-Siluriani (Ordovician.) The Upper Laurentian of Logan (Labradorite, Anortho- site, or Norian Series), supposed by him to overlie the 1 See also Museum Memoir on Eozoon, pp. 2T 3. Montreal, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Natural History Society of Montreal. Montreal : Natural History Society
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