Canadian mining journal January-June 1905 . oloring. tenay series, as it contains the most ancient and therefore, wemight say, the best quality of coal. It owes its exposure herealtogether to the uplift of the Rocky Mountains and is foundto the west of the outer break of the range. This outerbreak has been of such dimensions that the uplifted beds onthe west exposed the lower rocks as low down in the series asthe Cambrian, and these latter rocks are found thrust up overthose of the middle Cretaceous to the east of the fault. Atthe gap of the Ghost River, Mr. McConnell observed an over-thrust o
Canadian mining journal January-June 1905 . oloring. tenay series, as it contains the most ancient and therefore, wemight say, the best quality of coal. It owes its exposure herealtogether to the uplift of the Rocky Mountains and is foundto the west of the outer break of the range. This outerbreak has been of such dimensions that the uplifted beds onthe west exposed the lower rocks as low down in the series asthe Cambrian, and these latter rocks are found thrust up overthose of the middle Cretaceous to the east of the fault. Atthe gap of the Ghost River, Mr. McConnell observed an over-thrust of over two miles, and estimates the total there to benearly seven. A rough diagram of the section as observed at the BowRiver Gap from near Cochrane to the valley of the Spray River, will help to place before the eye the disposition of thebeds after the various fractures. The amount of displace- ment of the outer fault is conjectural in so far as concerns thethickness of the lower portion of the Cretaceous. Faint lines 0/ / ^7 60 o O ,11 t. THE CANADIAN MINING REVIEW. to show the amount of eroded material are added, but itmust be remembered that the breal<s which are so sharpthroiugh the Hmestones probably when continued upwardthrough the softer rocks vary much in character and werecompounded or even ran into folds before reaching the sur-face. The original surface line would probably representthe section of an undulating elevated plateau.
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