GEOLOGICAL SITKVEY OF THE TEERITORIES. 



71 



ebullition. The grotto in the glen, (Fig. 19,) is a fine illustration of 

 the beautiful decorations, and along the channels of the streams that flow 

 from the vivid coloring is well displayed. From the summit the stream 

 is continually arising from a number of vents, each one of whicli is 

 lined with sulphur. Quantities of steam are ever ascending from the 

 springs, but on a damp morning the entire slope of the mountain is 

 enveloped in clouds of vapor. 



The question of the an- Fig. 19. 



tiquityof these springs is 

 one of great interest, and 

 yet, with all the evidence 

 before us, it is somewhat 

 obscure. Upon the mar- 

 gins of the mountain, high 

 above the present position 

 of the hot si)rings, is a bed 

 of very white or yellowish- 

 white limestone, 50 to 150 

 feet thick, and appearing 

 in the distance like very 

 pure Carboniferous lime- 

 stone. (Fig. 20.) It is reg- 

 ularly stratified, and the 

 jointing is complete, and 

 immense masses have fallen down on the slope of the mountain side. 

 There is a belt a mile long and one-fourth of a mile wide, covered with 



Fig. 20. 



GROTTO IN THE GLEN, WHITE MOUNTAIN HOT SPRING. 



OLD HOT SPRING. LIMESTONES SHELVING OFF BY FROST, ETC. 



immense cubical blocks of the limestone 50 to 100 feet in each dimension, 



