l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 72 



On returning', a camp was made in the Bow Valley below Lake 

 Louise at the foot of the Sawback Range, where a brief examination 

 was made of the up-turned Carboniferous, Devonian, and Cambrian 

 formations, and fossils were collected, many of which are identical 

 with those found in the Glacier Lake section. One of the views 

 across Bow Valley is of Mount Ball (fig. 14), which is one of the 

 massive peaks on the Continental Divide where the Middle Cambrian 

 rocks have a great development. 



The preliminary study of the fossils in the several formations cor- 

 relates them with the Upper Cambrian formations of Wisconsin and 

 Minnesota and the Upper Cambrian section in southern Idaho, and 

 to a more limited extent with that of the central belt of Pennsylvania. 



GEOLOGICAL AND PALEONTOLOGICAL EXPLORATIONS AND 



RESEARCHES 



Field-work in the Department of Geology has been considerably 

 restricted by prevailing conditions during the season of 1919. 

 Research work has, however, continued on the collections accumu- 

 lated either in years past or obtained through gift or purchase in 

 more recent times. 



One of the most interesting acquisitions to the geological col- 

 lections during the year 1919, was some 15 kilograms of the meteoric 

 stone which fell at Cumberland Falls, Kentucky, in April of this 

 year. The stone, which proved to be a coarse breccia of enstatite 

 fragments and a dark chondritic stone, has been studied by Dr. Mer- 

 rill, and a pa])er giving his results is now in press. 



Owing to the fact that the division of Mineralogy has been without 

 a head for two years, a large amount of work upon the collections has 

 been necessary and hence only a limited amount of field and research 

 work was possible. On his own initiative, two field trips were under- 

 taken by Assistant Curator Foshag, one to the mica mines about 

 Amelia, Virginia, where a considerable amount of study material was 

 collected. This included a large number of specimens of the rare 

 mineral microlite and an exhibition specimen of manganotantalite, 

 the latter species not before represented in the Museum's exhibition 

 series. The old iron mine at Brewster, N. Y., was also visited and 

 some material for study collected. The work of the division in the 

 Museum's laboratory consisted in an investigation of the hydro- 

 talcite minerals, resulting in the establishment of the true chemical 

 nature of this group. Shorter researches on miscellaneous minerals 



