548 INDEX TO THE STEATIGRAPHY OF NOHTH AMERICA. 



(latitude 76° 20') and the entire east coast of Ellesmere Land, they give the name Cape Rawson 

 beds to an important overlying series which occupies the coast of Grinnell Land from Scoresby 

 Bay to Cape Cresswell, in latitude 82° 40' north. These rocks are described as being thrown 

 into a series of sharp folds, with a general west-southwest strike, the beds being often vertical 

 and frequently cleaved. The rocks consist of jet-black slates, with impure limestones traversed 

 by veins of quartz and chert, and of a vast series of quartzites and grits. They are compared 

 to the gold-bearing series of Nova Scotia, and doubtfully referred to the Huronian system. 

 Their lithologic character, however, as compared with the Canadian rocks, and in view of the 

 occurrence elsewhere to ^he north of a great Lower Cambrian series, appears to me to favor 

 their inclusion in that series rather than in the Huronian. 



Schei^'"'^ discovered extensive exposures of "quartz sandstones with subor- 

 dinate schists and limestones" on both shores of Heureka Sound (between Grinnell 

 or Ellesmere Land and Heiberg I^and) which he describes as Mesozoic. They con- 

 tained ammonites and lamellibranchs, among others possibly Daonella lammelK. 



