APPENDIX 



A. Geological Rp:lations of Eozoon, 

 Arcilk(jzoon, etc. 



T N the text I have given the arrangement of the 

 ■*■ pre-Cambrian rock-formations of Canada, as 

 understood by me at the time of the delivery of the 

 lectures on which this work is based — an arrangement 

 which I believe will, in the main, be sustained by 

 the work of the future, but which cannot as yet be 

 received as final. The work of Logan and Murray, 

 so far as I have had opportunity to go over their 

 ground, was admirable ; but since their time the 

 progress in the settlement of the country, the ex- 

 tension of railways, and other means of communi- 

 cation, and the opening up of mineral deposits have 

 greatly increased the means of obtaining information, 

 and detailed explorations have been in progress 

 under the Geological Survey of Canada. At this 

 moment, under the new Director of the Survey, Dr. 

 G. M. Dawson, much work is being done in this 



895 



