ALTERNATIONS OE GNEISS AND SCHIST. 369 



defined line of contact, but a transitional series of layers of alternate gneiss and schist. 

 These bed-like sheets of gneiss within the schist, however, are injected." * 



Again, speaking of the same subject in a later report, Dr. Lavvson, refer- 

 ring to these sheets, says : 



" Some are acres in extent and some take the form of bands one or several miles in 

 length by hundreds of feet in breadth, which in single sections might easily be mis- 

 taken for interstratifications with the gneiss." f 



I introduce here also a remarkable record made by Dr. Lawson concern- 

 ing another occurrence in the region of the Lake of the Woods : 



"The interesting or prominent portion of the point is occupied by the following 

 alternation of bands of gneiss and schist, the strike of the rocks being S. 50° E. and 

 the dip either vertical or at very high angles to the south : 



1. Gneiss 1 foot 7 inches. 



"J. Hornblende schist 54 feet. 



3. Gneiss 11 " 



4. Hornblende schist 60 " 



5. Gneiss .3 " 8 " 



6. Hornblende schist 31 " 



7. Gneiss 1 " 8 " 



8. Hornblende schist 11 " 



9. Gneiss 20 " 



10. Hornblende schist 22 " 



11. Gneiss " 8 " 



12. Hornblende schist 58 " 



13. Gneiss 4 " 4 " 



14. Hornblende schist 6 " 



15. Gneiss " 6 " 



16. Hornblende schist 32 " 



17. Gneiss 12 " 2 " 



18. Hornblende schist 13 " 



19. Gneiss 1 " 8 " 



20. Hornblende schist 4 " 



21. Gneiss 3 " 



22. Hornblende schist 1 " 3 " 



23. Gneiss 1 " 6 " 



24. Hornblende schist 5 " 



25. Gneiss " 4 " 



:'ii. Hornblende schist " 8 " 



27. Gneiss 1 " 



28. Hornblende schist 1 " 



29. Gneiss 2 " 8 " 



30. Hornblende schist 5 " 



31. Gneiss 100 ; < 



32. Hornblende schist 12 " 



33. Mixed gneiss and schist 20 " 



Gneiss, indefinite thickness. "j 



* Geolog. Report Canada, 1885, Doc. CO, pp. 72, 1i. See also Rep. 1888, F, pp. 116, 118, et pas. 



f Report, 1888. p. 132. 



%Ann. Rep. Gcol. Surv. Canada, 1885, Doc. CC, pp. 74-75. 



