2 GEORGE V. 



SESSIONAL PAPER No. 25a 



A. 1912 



CHAPTER VIII. 



CORRELATION OF FORMATIONS IN THE ROCKY MOUNTAIN 



GEOSYNOLINAL. 



Correlation along the Forty-ninth Parallel. 



The stratigraphic equivalence of respective formations in the Lewis, Galton, 

 Purcell, and Summit series is indicated in Tahle I. and in the plate bearing 

 their columnar sections. This correlation is based on lithological similarities 

 of individual members. Confidence in the general correlation is greatly 

 strengthened by the fact that the lithological succession in one series is matched 

 more or less closely by a similar lithological succession in all the other series. 



Table I. — Correlation of the Bocky Mountain Geo synclinal rocks. 



Summit series. 



Purcell series, 

 western phase. 



Galton series. 



Lewis series. 



Conformity with Upper E { gurface _ 

 ra'eozoic . 



Erosion surface. 



Erosion surface. 



Lone Star, 2000' + 

 Phyllite and quartzite. 



Moyie, 3400' + 

 Metargillite, with 

 quartzite and 

 shale. 



Roosville, 600' + 



Metargillite with quart- 

 zite. 



Phillips, 550' 

 Metargillite with quart- 

 zite. 



Gateway, 2025' 



Metargillite with quart- 

 zite and dolomite. 



Kintla, 860' 

 Argillite,sandstone and 

 dolomitic limestone. 



Sheppard, 600' 

 Silicious dolomite, with 

 quartzite and argil- 

 lite. 





Purcell Lava, 465' 



Purcell Lava, 310' 



Purcell Lava, 260' 



Beehive, 7000' 



Quartzite with metar- 

 gillite and phyllite. 



Kitchener, 7400' 

 Quartzite, with me- 

 targillite. 



Siyeh, 4000' 

 Dolomitic limestone, 

 with much metargil- 

 lite and some quart- 

 zite. 



Siyeh, 4100' 

 Dolomitic limestone, 

 with much metargil- 

 lite and a little quart- 

 zite.' 



Ripple, 1650' 

 Quartzite. 



Wigwam, 1200' 



Sandstone, with metar- 

 gillite. 

 MacDonald, upper part, 

 700' 

 Metargillite. 



Grinnell, 1600' 

 Metargillite, with quart- 

 zite. 



25a — vol. ii — 11 



161 



