xxii DEPARTMENT OF THE INTERIOR 



2 GEORGE V, A. 1912 



11. Casts of salt-crystals in Kintla argillite. 



12. Looking east across Flathead Valley fault-trough, to Clarke range. 



13. Head of Lower Kintla Lake. 



14. A. — Cliff in Siyeh limestone, showing molar-tooth structure; at cascade in 



Phillips Creek, eastern edge of Tobacco Plains. 

 B. — Concretion in dolomite; lower part of Gateway formation, Galton range. 



15. A. — Limonitized, simple and twinned crystals of pyrite, from Gateway for- 



mation at summit of McGillivray range. 

 B. — Similar pyrite crystals in metargillitic matrix. 



16. Exposure of the massive Irene conglomerate in head-wall of glacial cirque. 



17. A. — Ripple-marks in Ripple quartzite; positives. 



B. — Ripple-marks in Ripple quartzite; negatives (casts). 



18. Negatives of ripple-marks in quartzite. Summit of Mt. Ripple. 



19. Mount Ripple and summit ridge of the Selkirk mountain system. 



20. Columnar sections of the Summit, Purcell, Galton, and Lewis series. 



21. Diagrammatic east-west section of the Rocky -Mountain Geosynclinal at the 



Forty-ninth Parallel. 



22. A. — Molar-tooth structure in Siyeh limestone (weathered), Clarke range. 

 B. — Molar-tooth structure in Castle Mountain dolomite (unweathered) on 



main line of Canadian Pacific railway. 



23. A. — Porphyrinic phase of the Purcell Lava; from summit of McGillivray 



range. 

 B. — Quartz amygdule in the Purcell Lava. 



24. Secondary granite of a Moyie sill, fifty feet from upper contact. 



25. Phases of the Moyie sill: specimens one-half natural size. 



26. Looking eastward over the heavily wooded mountains composed of the Priest 



river terrane, Nelson range. 



27. A. — Contrast of normal sericite schist of Monk formation (left) and contact- 



metamorphosed equivalent in aureole of summit granite stock, a coarse- 

 grained, glittering muscovite schist (right). 

 B. — Spangled, garnetiferous schist characteristic of Belt E of Priest River 

 terrane. 



28. Typical view of Bonnington-Pend d'Oreille mountains of the Selkirk system. 



29. Percussion marks on quartzite boulder in bed of Pend d'Oreille river. 



30. A. — Sheared phase of the Rykert granite, showing concentration of the femic 



elements of the rock (middle zone). 

 B. — Massive phase of the Rykert granite, showing large phenocrysts of alka- 

 line feldspar. 



31. Tourmaline rosettes on joint-plane of quartzite; from contact aureole of 



summit granite stock, Nelson range. 



32. Felsenmeer composed of Rossland volcanics, Record Mountain ridge, west 



of Rossland. 



33. Two views of shatter-belt about the Trail batholith, Columbia river. 



34. Sheared Cascade granodiorite, showing banded structure. 



35. Park land on Anarchist plateau east of Osoyoos lake. 



36. Fossil plants in the Kettle River sandstone. 



