110 



GEOLOGICAL SUEVEY OF THE TEREITORIES. 



Fig. 27. 



18 



SECTION OF THE BEDS IN SI'KING CANON 



the ridge toward the north, it is south 

 300-350 west; angle, 80O-85o. Still 

 higherui^it is south 20° west; angle, 85°; 

 and then becomes, within a very short 



J distance, south 10° west; angle, 88°-90o. 

 As we progress it passes the vertical 



2 and dips northeast at a high angle, 



1 which gradually decreases, the dip be- 



2 coming more and more northerly until 

 the arch is completed. At the western 



^ end of the caiion beneath the limestone, 



3 which immediately succeeds the fossilif- 

 erous sandstone, there is a fine exposure 



4 of quartzite-beds, the top layers of which 



5 are somewhat calcareous. Then comes 



6 a layer of conglomerate made up of 



7 green and brown flint pebbles, varying 

 from the size of a walnut to eight inches 

 in diameter. Associated with these peb- 



8 bles are geodes of quartz, some of which 



9 contain calcite. 

 The best section of all the beds ex- 

 posed in Spring Oaiiou is obtained in 



^ the center of the caiion at the point 



^ marked in Fig. 26 by the dotted line S. 



We commence at the top- of the hill, 



which rises 1,160 feet above the level of 



2 the creek. The first bed we notice is a 



highly metamorphic-lookiug quartzite, 



13 which crops ont along the summit of 



14 the hill. Its general color is a dull red, 

 ^^ passing in places into a dull purple and 



15 again becoming light gray, with bright 

 red and yellow streaks. Some of them 



^^^^ 17 have an almost flinty fracture. We esti- 

 mated the thickness of the beds at 50 

 feet. JS^ext below these beds are quartz- 



1^0 ites and light gray sandstones followed 

 by conglomerates, in the lower layers of 

 which the pebbles are very fine. The. 

 conglomerates are followed by brown 

 limestones and sandstones, the weath- 

 ering of which gives a red tinge to the 

 soil. These beds are succeeded by fine, 



'32 dark-gray calcareous sandstones, which 

 break into lamiuse of from two to four 



33 inches thickness, l^ext to these are the 

 coarse-grained fossiliferous sandstones 

 that I have referred to above, (layer 

 No. 7 in the section,) containing frag- 

 ments of O&trm and Camptonectes.- They 

 might almost be called siliceous lime- 

 stones from the amount of lime they 

 con tail], but they are made up of co9.rse 

 grains of sand and more properly de- 

 serve the name of sandstones. Inter- 



