12 SMITHSONIAN' MISCELLANEOUS COLLECTIONS \ OL. O3 



])ression and shearing have so changed the character of the rock that 

 it is impossil)le to obtain fossils in a condition to be of service. 



The collections of 1913 contain a number of very important addi- 

 tions to this ancient Cambrian fauna, and many tine additional ex- 

 am]')les of s]iecies found in 1012. 



Fig 14. — Bowlder train on the surface of the west side of Hunga Glacier, 

 overh)oking the Ro1)son Pass, British Columhia. The Secretary of the Smith- 

 sonian Institution is standing beside the bowlder. Photograph by Miss Helen 

 B. Walcott, TOT3. 



GEOLOGIC HISTORY OF THE APPALACHL\N VALLEY TX 



MARYLAND 



Dr. R. S. P.assler, curator of paleontology in the U. S. National 

 Museum, spent a month during the summer of 191 3, in the Appalach- 

 ian X'alley of Maryland and the adjoining States, studying the 

 Postpaleozoic geologic history of the region, as indicated by the 

 ])resent surface features. His studies, which were under the joint 

 auspices of the I'. S. National Museum and the Maryland (ieological 

 Survey, were in continuation of work carried on during the j^revious 

 summer when the sedimentary rocks of the region were mapped in 

 detail, the final object being the preparation of a report on the Lower 



