. Annual report. 1st-12th, 1867-1878. Geology. 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 tl
. Annual report. 1st-12th, 1867-1878. Geology. 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 - injmediate 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 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
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