REPORT OP NAOMOiSTAL MUSEUM, 1925 81 



In May Doctor Foshag was detailed to attend an exhibition of 

 minerals by Ward's Natural Science Establishment held in New 

 York City with a view to securing desirable specimens and also 

 to study Colonel Roebling's collection at Trenton and make a trip 

 to the Franklin Furnace region in search of rare minerals. Such 

 as were obtained were purchased by the Roebling Fund. 



Aided by grants from the O. C. Marsh and Joseph Henry endow- 

 ment funds of the National Academy of Sciences, Secretary Wal- 

 cott continued field Avork in the Canadian Rockies of western 

 Alberta for the purpose of completing his reconnaissance of the pre- 

 Devonian formations north of Bow Valley. Notwithstanding a 

 most unfavorable field season, fossils were obtained from typical local- 

 ities and a number of stratigraphic sections measured. The main 

 objective of Doctor Walcott's work was to determine the correct 

 geological horizon of the Lyell limestone. Many attempts to do 

 this during the past six years resulted in failure, and it began to 

 appear that these thick, coarse magnesian limestone beds were barren 

 of fossils. In measuring geologic sections in the Tilted Mountain 

 area interbedded bluish-gray layers with fragments of Upper Cam- 

 brian trilobites were at last found. The lowest horizon was rich 

 in forms closely related to those of the Franconia formation, while 

 the upper furnished types similar to those in the St. Lawrence mem- 

 ber of the Trempealeau formation. 



During August and September of 1924, Dr. Charles E. Resser 

 continued his field explorations of the Cambrian and associated 

 formations in the Rocky Mountains, financed partly by a grant 

 from the National Academy of Sciences. Beginning at Colorado 

 Springs, where the Lower Paleozoic beds along the Rocky Moun- 

 tain front were studied and excellent collections of Ozarkian fossils 

 obtained, work was continued in Logan Canyon, Utah, and ex- 

 tended to the Cooke City ranger station at the extreme northeastern 

 corner of Yellowstone National Park. Cambrian fossils were 

 secured at various points, the most interesting specimen of all being 

 the entire Cambrian crinoid already mentioned, which was found in 

 the Cooke City region. After a brief trip to the south end of 

 Gallatin Range, work was continued in the Teton Mountains. The 

 latter part of the season was spent in various parts of the Wasatch 

 Range to determine the stratigraphic position of the beds from which 

 some of the earliest collections of fossils were made by exploring 

 parties sent out previous to the settlement of the country. 



Curator Bassler spent his vacation in the Cumberland River dis- 

 trict of Northern Tennessee, where, under the joint auspices of the 

 Geological Survey of Tennessee and the National Museum, he 

 studied the geology of the Lillydale and contiguous quadrangles, and 



