IV TABLE OF CONTENTS. 



logic of his statements indicated, 341. Bigsby points out that the Huronian is 

 distinct from tlie Cambrian and conformable with the Lanrentian, 341, 342. 

 Logan's statement, iu the Report for 1863, that the Laurentian rocks had 

 been shown by the Canada Survey to be metamorphic sedimentary, controverted, 



342. The relation of position of the Laurentian and the Huronian discussed, 



343, 344. In the Report for 1863, Logan abandons the idea that the copper- 

 bearing rocks of Lake Huron and those of the soutli shore of Lake Superior are 

 of the same age, 344. Hunt's A-iews, set forth in the same Report, as to the 

 sedimentary character of the labradorite rocks in the Laurentian, 344. Macfar- 

 LANE, in the Report for 1863-66, describes' the contact of some supposed 

 Huronian with the Laurentian, on north shore of Lake Superior, near Michi- 

 picoten Island, 345 ; his observations show that both formations are eruptive, 

 and of the same age, 346. Hunt, in Paris Exhibition Report of 1867, claims 

 that the Laurentian comprises two distinct sets of rocks, unconformable with 

 each other, 346. Richardson, in Report for 1866-69, on the Laurentian of the 

 Lower St. Lawrence River, 346. Marcou says that the Laurentian is a mix- 

 ture of the Upper Taconic with the " Triassic of Lake Superior," 347. Bell, 

 in the Reports for 1871-72 and 1872-73, points out the conformability of the 

 Huronian and Laurentian in the region northwest of Lake Superior, 347, 348 ; 

 Selwyn thinks this apparent conformity only local, and that there is really a 

 very considerable break between the two formations, 348. Selwyn's views 

 shown to have no basis of fact, 348. G. M. DAVi^soN's and Bell's observations 

 in the same region, 349 ; their views criticised and commented on, 349. Bell, 

 in the Report for 1877-78, shows that the Laurentian and Huronian are con- 

 formable in the Hudson's Bay region, 349, 350. 



First mention of the Plastings series, by Murray, in Report of 1852-53, 350 ; 

 the same discussed by Macfarlane, in Report of 1866, also by Logan, who 

 says that it is conformable with the Laurentian, 350 ; Hunt says that the 

 Hastings series is overlain unconformably by the Upper Laurentian, 350. 

 Vennor gives two entirely different sections of the Hastings series in 1867, 

 and in the Report for 1866-69, 351 ; his views as to the relations of this series to 

 the Laurentian and Huronian, 352-354. Hunt, in 1869, refers the Hastings 

 series to the Laurentian, 350 ; in 1870, to the Terranovau, this being regarded 

 as in part Potsdam, 354, 355 ; Hunt, in 1871, says that the Hastings series is 

 conformable with the Laurentian, 355 ; later in the same year, that it is not, 

 355 ; in 1875, he says that the Montalban or Hastings series occupies a position 

 between the Laurentian and the Trenton, 356 ; in 1878, he refers the Hastings 

 series to the Lower Taconic, and misstates the views of Logan and Bell in 

 regard to its conformability with the Laurentian, 356. Selwyn announces very 

 different views from those of Hunt, and shows up something of the prevail- 

 ing confusion in Canadian geology, 356-359. Macfarlane, 1879, objects to 

 Selwyn's views, 359 ; J. W. Dawson asserts his disbelief in the results of the 

 Canada Survey, as bearing on the age of the Hastings series, 359. 



NEW BRUNSWICK. 



J. W. Dawson, in 1855, refers the rocks in the vicinity of St. John to the Lower 

 Carboniferous, and in 1861 to the Devonian, 360 ; Matthew divides the same 



