270 REVIEWS — GEOLOGICAL SURVEY OP CANADA. 



and Little Lakes George, St. Mary River, and a portion of Sugar 

 Island. The physical structure of the district was principally worked 

 out by means of a broad limestone band, associated with the other 

 Huronian rocks. The formation generally, as in other places, was 

 found to be traversed by masses of trap, greenstone, and porphyrytic 

 granite. Copper pyrites appeared to be disseminated very generally 

 through the greenstone, and in quartz veins, especially south of Echo* 

 Lake and north of the mouth of Root Eirer ; both of which localities, 

 Mr. Murray informs us, have been taken up for mining purposes, but 

 without advantageous results. Specular Iron Ore was also observed, 

 both in the trap and in the sedimentary portion of the series. Around 

 Echo Lake, the rocks presented examples of polished surfaces with 

 ice-grooves and scratches, the direction of the latter varying from S* 

 550 W. to S. 70° W. 



The Report of the Assistant Provincial Geologist is followed by 

 one from the pen of Mr. Richardson, Explorer to the Survey. Mr. 

 Richardson's labors comprise a detailed examination of the Magdalen 

 River, in Gaspe, and a portion of the country to the east as far as 

 Gaspe Bay ; with an exploration of the Saguenay and Lake St. John. 

 His Report, like that of Mr. Murray, is accompanied by several plans 

 and sections*, and abounds in matter of much geological interest, 

 more especially when considered in connexion with the previous ex- 

 plorations of Sir William Logan and Mr. Murray in the Gasp§ penin- 

 sula. In its physical structure. Eastern Gaspe appears to offer a 

 series of synclinals and anticlinals running more or less parallel to 

 the northern coast, and comprising, passing from north to south, a 

 range of beds from the upper portion of the Lower Silurian strata to 

 the lower portion of the Carboniferous formation. In Mr. Richard- 

 son's map, one of these synclinals is shewn to constitute a probable 

 •continuation of Gaspe Bay, and to extend westerly in a broad trough 

 •far into the county. The edges of the trough consist of " Gaspe lime- 

 stone," with " Gaspe sandstone " in the central portion. Amongst 

 ith6 economic substances met with by Mr. Richardson in that portion 

 of Gaspe to which his explorations were confined, the following are 

 cited : — Brick-clay from the mouth of the Magdalen, Serpentine (ap- 

 parently, however, of poor quality), and common and hydraulic lime- 

 stones — the latter, magnesian. 



* The topographical work of Mr. Richardson's exploration was performed by Mr. Scott 

 iBarlow, whose efficient services are fully credited in the Report. 



