44 



MATTHEW. 



basin the Etcheminian thins out and disappears 

 in going westward. 



Crossing from the St. John Basin to the one 

 next northward containing Cambrian rocks, 

 we find this to be one in which no Etchemin- 

 ian rocks appear. The Etcheminian here has 

 been entirely eroded before the deposition of 

 the Cambrian, and this is the condition for 

 many miles to the westward. 



Passing over another plateau about five 

 miles wide one reaches a third valley in which 

 Cambrian sediments remain. Here we again 

 meet beneath them the familiar red rocks of 

 the Etcheminian, exposed along an anticline 

 with Cambrian measures on both sides of it. 

 The Etcheminian appears also along the north 

 side of this basin' and, so far as thickness -of 

 measures counts, is an important part of the 

 Eopalseozoic sediments there. 



Section on Hanford Brook. — In the eastern 

 part of St. John County at Hanford Brook a 

 clear section of the lower part of the Eopalaeo- 

 zoic is exposed, and is worthy of comparison 

 with that of Smith Sound in Newfoundland de- 

 scribed on a following page. From this section 

 at Hanford Brook (Fig. 2) we see that the Hu- 

 ronian (Coldbrook) in Prepalseozoic times, 

 formed in this area a district raised above the 

 sea, against which a sea-beach deposit was 

 made, the initial member of the Etcheminian. 

 As the land sank the texture of the sediments 

 changed, first to sand and then to clay. Sub- 

 sequently there was a gradual re-elevation, so 

 that flags alternated with the finer beds, and 

 finally predominated in sandstones full of cast- 

 ings and burrows of worms. With added eleva- 

 tion of the land the condition of a sea beach 



m 



