﻿Geological Map, District ahout Montreal. 24T 



Geological Report and Map of the District 

 ABOUT Montreal. 



By John A. Dresser, B.A, 



As was mentioned in the last number of The Eecord 

 OF Science, the Annual Keport of the Geological Survey 

 of Canada (New Series, Vol. VII.), which has recently been 

 issued, contains a report and map of that portion of the 

 Province of Quebec comprised in the Montreal sheet of 

 the series of maps now being issued by the Geological 

 Survey of Canada. As this embraces the district imme- 

 diately about Montreal, it is of especial interest to mem- 

 bers of the Natural History Society. 



The report is written by Dr. K. W. Ells, the chapter on 

 the Laurentian north of the St. Lawrence Kiver by Dr. F. 

 D. Adams, while the appendix, containing a list of fossils,, 

 is the work of Dr. H. M. Ami. The map is from the sur- 

 veys of Dr. Ells and Dr. Adams, together with the earlier 

 work of Sir W. E. Logan. It was originally drawn by the 

 late Robert Barlow in 1868, and has been corrected to 

 1895 ; it is engravad by the Sabiston Lithographic Co. 

 The coloring of the map is generally distinct, thus clearly 

 indicating the different geological systems, while their 

 subdivisions are easily recognized by the system of well- 

 arranged distinctive markings, as well as by letters and 

 numbers. 



The topographical features are also minutely shown,, 

 which lends much additional interest and value to the 

 map, the whole execution of which must be regarded as 

 excellent. 



It is, however, not very detailed. The different series- 

 are not subdivided so as to show the subordinate forma- 

 tions which they comprise, and in some cases a whole 

 geological system, as the Cambrian, is undivided. Also 

 the delimitation of the various systems is often somewhat 

 approximate. 



