33 



A section was examined some years ago by Mr. Hugh Fletcher, Section on 

 who found in the gorge at the old mill at McCodrum brook the fol- brook, 

 lowing measures : 



Feet. 



1 . Reddish, fine, coherent micaceous sandstone 1 6 



2. White quartzite, or grit, in which the grains 



are scarcely distinguishable. It passes 

 into white quartzose conglomerate 10 



3. Purple, pebbly, close-grained quartzose grit, 



passing, lower down the brook, into red- 

 dish conglomerate with pebbles as large 

 as hazel nuts. Dip. N. 76 E. < 30. ... 1 



4. Greenish-gray, soft somewhat soapy and 



flaggy argillite. Dip.N. 53 E. < 29. . . 59 



5. Greenish, nearly compact micaceous sand- 



stone, slaty or in even flaggy beds. It 

 forms curious gorges and falls, being cut 

 on the strike for a great distance, so that 

 the angle of dip is the slope of the right 

 bank of the brook. Dip. N. 50 E. < 33. 540 



626 



In quoting this section I have reversed Mr. Fletcher's numbers. 

 His record of dips on the lower part of the brook south of this section 

 shows that the Etcheminian here is mantling around the felsite hill, 

 ' McCodrum mountain,' and the lower part of the lower division of 

 the Etcheminian is thin. Nos. 1, 2 and 3 correspond to the assises 

 a and b of the lower division, and No. 4 to the assises c, d and e. 

 Lingulepis Gregwa and other brachiopods, not well preserved, are 

 found in the slates on McCodrum brook. No. 5 is chiefly the middle 

 division of the Etcheminian, of a grayer colour than in Indian Brook 

 valley. 



The beds at the contact of Nos. 3 and 4 have seams of red and pale 

 yellow ochre. They are finer than the corresponding shales on Dug#ld 

 Brook. 



On the west side of the Mira valley we found no exposures that 

 would exhibit a continuous section of the Etcheminian terrane, nor 

 on the east side were there any such ; but on this side, exposures of 

 ledges along the roads and streams and the surface soil show that the 

 group is well developed. 



3 c. R. 



