Revieicii — Geological Survey of Canada. 237 



The rocks met with were all found to be of great antiquity, all more 

 or less altered by pressure induced by intrusions of igneous masses, 

 which folded the bedded series and produced foliation in much of the 

 otherwise massive granites, gabbros, diabases, and other greenstones. 

 The foliation of the granites shows that the pressure was exerted 

 from a direction varying from west to south-west. Where massive 

 beds of cherts and quartzites resisted the folding action, they with 

 their associated beds of softer shales or slates have been shoved 

 into ridges by overthrust faults, giving the hills cliff-faces inland, 

 while their seaward slopes conform closely with the dip of the beds. 



The gneisses seem to be metamorphic products of several rocks 

 of different age and origin. Some of them probabl3' represent part 

 of the original Archeean complex ; others may represent granites 

 of a somewhat later date, injected into the first, but long anterior 

 to tlie time of deposition of those sedimentary beds of Labrador 

 that have been provisionally^ classed as Cambrian. 



Glacial action has left its traces everywhere, the entire coast 

 having at one time been covered by an ice-sheet sufficiently thick 

 to override the highest hills. 



A short chapter on the marine terraces which mark the limits 

 of the subsidence of the land brings this interesting report to a close. 



Dr. Bell's report (M), which follows, deals with the northern side 

 of Hudson Strait. Baffin Land, a treeless region like that of the 

 southern side of the strait, is made up principally of Laurentian 

 rocks ; a considerable area, however, of flat Silurian limestone 

 borders the western shore in Fox Basin, and extends inland ta 

 Lake Nettilling. Satisfactory evidence is given of the occurrence 

 of the Trenton and Utica formations, and it is stated on the 

 authority of Professor Schuchert, of the United States National 

 Museum, that the Baffin Land fauna had, like that of Manitoba, 

 an early introduction of Upper Silurian. 



It is added that among the Arctic islands northward of Baflfin 

 Land large areas of Upper Silurian rocks are known to occur 

 associated with strata of Lower Silurian age. 



Three appendices contain (1) observations of latitude made by 

 Dr. Bell, (2) a list of plants collected by him in Hudson Strait, 

 (3) a short list of Lepidoptera. 



The scenic features of the country are, as usual in these report s,^ 

 well brought out by photographic reproductions. 



Dr. Hoffmann's report (E.) of the section of Chemistry and 

 Mineralogy consists of mineralogical notes and analyses of various 

 oi'es, and of natural waters, also gold and silver assays. 



Mr. E. D. Ingall contributes a report on mineral statistics and 

 mines for 1898, which begins with a general table of the mineral 

 production of Canada for a period of thirteen years, representing 

 the work of the Mines Section of the Geological Survey. These 

 statistics show that Canadian mining industry is in a very flourishing^ 

 state. 



The last eighteen pages of the volume are devoted to a very 

 serviceable index in double columns. Arthur H. Foord. 



