REPORT OF THE CHIEF ASTRONOMER xxn 



SESSIONAL PAPER No. 25a 



11. Drawing from thin section of metamorphosed argillaceous sandstone, Wolf 



formation. 



12. Diagrammatic map showing approximate position of the Rocky Mountain 



geosynclinal prism in its older phase. 



13. Locality map of the Moyie sills. 



14. Section of Moyie mountain and the Moyie sills, along the International 



boundary line. 



15. Diagram showing the petrographic nature of each of the Moyie sills and 



its stratigraphic position in the quartzites. 



16. Diagram illustrating the hypothesis that the partially differentiated syn- 



tectic magma of a thick sill may break through the roof and form, at 

 stratigraphically higher horizons, several thinner sills differing in com- 

 position among themselves. 



17. East-west section on ridge north of Lost Creek, Nelson range. 



18. Diagram showing stage of development of the thrust illustrated in Figure 



17. 



19. North-south section illustrating probable explanation of the great intensity 



and extent of the contact metamorphism at Summit creek. 



20. Diagrammatic map of summit granite stocks with wide aureole of contact 



metamorphism. 



21. Section along line A-B of Figure 20. 



22. Diagrammatic section showing relation of the summit stocks of Nelson 



range to the Bayonne batholith. 



23. Map showing relations of Pend d'Oreille argillite, aplitic granite, and two 



dikes of minette. 



24. Section of syenite porphyry chonolith satellitic to Coryell batholith. 



25. Section northeast of bridge over Kettle river, six miles above Midway. 



26. Partly diagrammatic drawing from thin section of ground-mass of ' shacka- 



nite.' 



27. Section of the Okanagan composite batholith. 



28. Map showing relations of the Osoyoos, Similkameen, and Kruger igneous 



bodies and the invaded Paleozoic formations. 



29. Plunging contact surface between the Similkameen batholith and the 



Chopaka roof-pendant. 



30. Outcrop of the same intrusive contact surface shown in Figure 29. 



31. Map of the Similkameen and Cathedral batholiths and the Chopaka intru- 



sive body, as shown in the Boundary belt. 



32. Map showing relations of the Cathedral and Remmel batholiths and the 



Ashnola gabbro. 



33. Map showing relations of the Remmel batholith, Park granite, and Basic 



Complex. 



34. Columnar section of the Pasayten series, including the Pasayten Volcanic 



formation (member A.) 



35. Map showing relations of the Castle Peak stock to the deformed Pasayten 



formation. 



36. Contact surface between the Castle Peak granodiorite and tilted Creta- 



ceous sandstones and argillites. 



