952 



NEW YORK STATE MUSEUM 



doubts about the reliability of Dictyonema f 1 a b e 1 1 i - 

 forme as an Upper Cambric index fossil. 



Dr Ells determines the stratigraphic succession of the fossili- 

 ferous Quebec terrane(p.63k-(>4k ; Cape Rouge section) as follows: 



1 Black, green and gray shales, with thick bands of quartzose 

 sandstone and occasional thin bands of limestone conglomerate. 

 (Lower Sillery) 



2 Mostly greenish, grayish and blackish shales with thin lay- 

 ers of gray sandstone. On the south shore of the St Lawrence, 

 below Levis and also on the south shore of the island of Orleans, 

 beds of conglomerate occur at about this horizon, in which the 

 Lower Cambrian fauna occurs (Olenellus thompsoni). 



3 Bright red shales, with thin bands of greenish and gray 

 shale. 



4 Red, greenish gray and black shales, with interstratified 

 sandstones ( Upper Sillery) . Obolella pretiosa occurs in 

 the upper part, near Sillery, and on the south side of the river 

 Obolella pretiosa, Protospongia fene strata', 

 P h y 1 1 o g r a p t u s typus, T e t r a g r a p t u s s e r r a and 

 Ling u la quebecensis. 



5 Levis shales and conglomerates of Point Levis (Caleif- 

 erous). 



6 Black and grayish striped or banded shales, etc. (Upper 

 Chazy or Lower Trenton). 



7 The black or brownish bituminous shales and limestones 

 of the city of Quebec and northwest side of the island of 

 Orleans. The contained fauna is of Trenton-Utica age. 



In regard to a correlation of the Cape Rosier or Die ty onema 

 zone of the Lower St Lawrence shore, we find in Dr Ells's report 

 (p. 82k) the following statement: 



From Me'tis to Cape Rosier the great bulk of the rocks . . . 

 belongs to the Sillery formation and much of it to the lower 

 portion of that division, and entirely below what we regard as 

 the fossiliferous or graptolitic Levis formation of the city of 

 Levis and the southwest end of the island of Orleans. 

 The rooks of Cape Rosier, in which the Die ty one ma 

 socialc, Clonograptus, etc., were found, as well as those 2 

 miles below Great Matane river, where similar forms occur, 

 represent divisions 2 and 3 of the Cape Rouge section and the 

 Beaumont shore, as well as of the strata on the sonlh side of 

 the island of Orleans, consisting of Mack, green and gray 

 shales, with some red beds, together with the gray limestones 

 and hard, grayish quartzites, while the associated limestone 

 conglomerates are like those seen at Beaumont and at the east 



