GEOLOGICAL SURVEY OF THE TERRITORIES. 



195 



ferruginous, from 2,000 to 2,500 feet in 

 in it,, and 1 know of nothing which 

 would give any grounds for judging' 

 as to its age. 



This is followed by probably 3,000 

 feet of quite compact, mostly thin- 

 bedded gray and drab limestone, 

 largely silicious, the lower part even 

 cherty and somewhat geodiferons. g 

 These beds contain a few fossils, | 

 Zaphrcniis, &(i., which are phiinly | 

 of Carboniferous age. % 



These higher beds make no ap- g 

 pearance ui)on the western slope of ]^ 

 this mountain-block, except in tlie - 

 inj mediate neighborhood of Ogden ^ 

 Cailon. The crest of the mountain | 

 consists of the lower quartzites, as | 

 shown in the section previously J? 

 given. The upper of the two subor- ; 

 diuate follls on the western slope has 5 

 its eastern side much steeper than I" 

 its western, and at some points al- ^a, 

 most pinched out. The lower and ^ 

 more westerly one has both sides ? 

 quite stee}), and the two edges of | 

 the thin plate of limestone which | 

 forms its central portion are folded S 

 so closely together as to appear, at .^ 

 first sight, when seen from below, 

 near the limekiln, like a single out- f 

 crop; higher on the spur, where 1 

 they perhaps spread a little more | 

 than they do below, the eastern edge •^. 

 has a di[) of only from .50'^ to 53°, g 

 and the western one of 75"^. E 



The iollowing- is a section of the i 

 strata as they are exposed in Ogden I 

 Oaiion. (Fig. 45.) The two subor- I 

 dinate folds of the western sIoDe of " 

 the anticlinal, having more westerly ^ 

 trends than the mountain-range it- ^ 

 self, pass under the valley before g 

 reaching Ogden Canon, and, accord- 2. 

 ingly, are not seen in this section, g 



in ascending the stream the first g 

 grand fold of the ujiper limestone is | 

 so mi.ch concealed by the debris as ^ 

 to be unnoticed until we pass the 

 second bridge and come to the 

 "wedge" figured in the report of 

 1871, and even then it is difQcult to 

 trace the (Tutliues of the fold on the 

 upper slopes. The second iold, how- 

 ever, is very prominent, forming an 

 mountainside, a half mile long and 



thickness, lifo fossils were seen. 



"vn 



immense tilted "Z" upon the 

 at least 1,000. feet high. The 



