504 DEPARTMENT OF THE INTERIOR 



2 GEORGE V., A. 1912 



Point, but some c greenstone ' (basalt or basic andesite) also occurs. North 

 of Jackass Point the country rock is mainly granitic, though interrupted 

 by a belt of slate. The impression of the observer was that these sedimen- 

 tary and volcanic rocks were plainly older than the Cretaceous and might 

 in part be correlative with the Cache Creek series.'* 



The results of Messrs. Smith and Calkins are seen to be essentially similar 

 to those of the present writer in his study of the Anarchist and Hozomeen 

 series. The discovery of Upper Carboniferous fossils in the very thick 

 sedimentary series cut by the Chilliwack river canyon, a series which corres- 

 ponds well lithologically with the Anarchist series and with some of the rocks 

 in Mt. Hozomeen, is further significant. (See chapter XVIII.) These sedi- 

 ments on the Chilliwack river are only about twenty-five miles west of Mt. 

 Hozomeen. It seems probable, therefore, that the Hozomeen series is to be 

 correlated with the Anarchist series, and both of them with Dawson's Cache 

 Creek series as well as with the likewise fossiliferous Chilliwack River series. 

 There is nothing, however, to prove that some part of the Hozomeen series, 

 if not a part of the rocks grouped under the name Anarchist series, is not of 

 Triassic or even early Jurassic age. Yet it should be noted that the fossiliferous 

 Triassic' rocks of the lower Chilliwack valley are lithologically unlike any rocks 

 observed in the Hozomeen ridge or in the area of cherty rocks across the Skagit. 

 Finally, this matter of correlation can not be fully understood without reference 

 to Dawson's several descriptions of the original Cache Creek series; to his 

 papers the reader is referred for fuller information.! 



STRUCTURAL. RELATIONS IN THE RANGE. 



In the Hozomeen range, for the first time since leaving the summit of the 

 Selkirks 130 miles to the eastward, we enter a comparatively broad belt where 

 stratified rocks afford horizons which permit of the discovery of the usual 

 mountain structures, folds and faults. The structures are relatively simple 

 and are illustrated in the map and section. 



The fundamental feature in the stratigraphy of the Hozomeen range is 

 the erosion unconformity at the base of the Pasayten series, where it rests on 

 the Remmel batholith. Above that horizon all the members of the series seem 

 to be quite conformable. The only pre-Cretaceous sediments are those in the 

 Hozomeen series which are also clearly in unconformable relation to the Lower 

 Cretaceous beds. 



As already noted the Cretaceous series forms a great monocline complicated 

 at its top by secondary crumples. The arch-and-trough structure is seen locally 

 on the heights east of Lightning creek. ( See general profile-section on map sheet) . 

 Elsewhere and thus generally throughout the range, faults are much more 

 important structural features than folds. Profound normal faulting took place 



* G. 0. Smith and F. C. Calkins, Bull. 235, U.S. Geol. Survey, 1904, p. 22. 

 t See specially G. M. Dawson, Bull. Geol. Soc. America, Vol. 12, 1901, p. 70, where 

 further references. 



