Notes on the Geology of Murray Bay. 145 



VI. Soft gray and dark gray laminated sandstone, seen at most 

 of the places above mentioned. The gap through which the 

 road passes upward from the pier, has been excavated in these 

 soft beds. In the lower part of these beds there appears in one 

 or two places a layer of coarse calcareous sandstone, holding 

 fragments of the Laurentian quartz rock. This lowest bed at 

 Pt. Baleine contains large specimens of Orthoceras, probably 0. 

 Bigsbyi, The soft sandstones abound in cylindrical marks, 

 seemingly casts of worm tracks. They also contain fragments 

 of carbonaceous matter, probably the remains of sea weeds. The 

 only shells found in them were small fragments of Linyula, and 

 a little Pleurotomaria^ which may either belong to a new species 

 or be a young individual of one already known. 



The following is a detailed section of the lower part of the 

 above series as it occurs in the east side of L'Ecorche. The order 

 is ascending, or the reverse of that in the foregoing general sum- 

 mary. 



Laurentian Series. — The upper part of this, at this place, is the quartz 

 rock before mentioned, with a high dip to the westward. It rests on gneiss, 

 and in the bank or cliff is seen to have the Silurian beds unconformably 

 superimposed. 



Silurian Series. — These dip W. 10^ N., or nearly in the same direc- 

 tion with the Laurentian rocks, at an angle of 10°, and consist of the 

 following beds : — 



ft. in. 

 ("1.) Gray and dark gray sandstone with worm burrows, thick- 

 ness estimated 12 



(2). Flaggy calcareous sandstone with a dark bed containing fu- 



coids?attop 5 



(3.) Softer sandstone with dark coloured bands, very fucoidal in 



upper part 4 6 



(4.) Hard calcareous sandstone 2 



(5.) Coarse sandy limestone light gray, with many large Lingulae 



(L. eva, Billings) and Tetradium 4 



(6.) Gray and dark sandstone with worm burrows and fucoids ; 



Murchisonia, Tetradium and Pleurotomaria 7 



(7.) Hard gray sandstone divisible into thin flags 2 



(8.) Thick bedded calcareous sandstone 4 



(9.) Dark gray calcareous sandstone, Murchisonia &ti^ Tetradium, 1 



(10.) Similar bed but very coarse 6 



(11.) Hard gray limestone, ilfwrcAtsonta and Pleurotomaria 1 10 



(12.) Hard gray brecciated or nodular calcareous sandstone 5 



(13.) Thin bedded, nodular dark gray lunestone full of Leper- 



ditia .,,, , 5 



Can. Nat. 6 Vol. VI. No. 2. 



