802 DEPARTMENT OF THE INTERIOR 



2 GEORGE V., A. 1912 



ones, and on the whole, they constitute the keynote for the four related 

 localities. 



Numbers 1428, 1430, 1433 and 1436 of the 1905 collections were taken from 

 a large area of what has always been regarded as Lower Cretaceous, occurring 

 at the Boundary (49th parallel) Line, at a point between the Pasayten and 

 Skagit rivers, within an area which is indicated on the Geological map as Cre- 

 taceous. ' There seem to be at least 28,000 feet of this series altogether, and 

 it appears to correlate with the Shasta-Chico Series.' An important aspect of 

 Nos. 1428 and 1430 is to be found in their relative ages as well as to whether 

 they are really Cretaceous. In this connection Dr. Daly observes that 'the 

 beds bounding them dip under ammonite-bearing beds of Cretaceous age, but it 

 is possible that they are younger and have been faulted down into that attitude.' 



1428 is a locality of exceptional interest, since it has yielded some of the 

 most perfectly preserved specimens of the entire collection, and it embraces at' 

 least one new species of fern which has great value as an index of geological 

 age. There are also a number of poorly preserved forms which, by comparison 

 with determinable ones, may be correlated with certain doubtful forms observed 

 in the collection of 1903, with respect to which the provisional conclusions for- 

 merly reached are now fully confirmed. 



1436 also represents fragments of stems or leaves of a very doubtful charac- 

 ter, but again, by comparison, it is possible to correlate them with recognized 

 species. 



Number 471 of the 1903 collection ' comes from a series of black, shaly 

 beds, associated with sandy strata, dipping 35 degrees due east on the eastern 

 slope of Sheep Creek valley just southeast of Rossland. The fossils came out of 

 bands immediately above the Red Mountain railroad track. The whole series 

 seems to be made up of assorted (water-laid) ash beds and tuffaceous deposits. 

 These are overlain by coarse agglomerates, which compose much of the great 

 volcanic group of rocks surrounding Rossland, and in which the copper-gold 

 ores are largely found.' 



Locality 471 is about one hundred and twenty miles east of 1428 and 1436, 

 being near Rossland, while the latter are on the summit of the Cascade moun- 

 tains. The specimens from 471 consist entirely of a number of pyritized frag- 

 ments of leaves which show little evidence that can be utilized for purposes 

 of identification. The locality is an entirely isolated one, but by close compari- 

 son of the specimens with those from the more western localities, it is possible 

 to draw the conclusion that there is essential identity with specimens from 

 1428, and that 1428, 1430, 1433, 1436 and 471 are all of the same age, questions 

 of the precise horizon within these limits to be determined in the following 

 discussion. 



A review of all the material embraced in the two collections, shows that it 

 falls into two well defined periods — Cretaceous and Tertiary, and it is most 

 gratifying to find in this connection that the tentative conclusions based upon 

 the very imperfect material of the 1903 collection have been fully sustained 

 by our later studies. 



