40 



Marion bridge. Certain dark gray clay slates, which, by their position 

 appear to be of this division of -the St. John terrane come in at the 

 h'ead of the Mira river. They are seen where the road crosses Canoe 

 brook ; on the west side of the Mira river also, about three-quarters 

 of a mile south of the lime-kiln on the road near Salmon river, dark 

 gray shales, of this age occur. At the latter place the shales contain 

 Agnosti and some other fossils. It is probable that a belt of these 

 slates runs along the eastern flank of .the 'Big Ridge,' on the east side 

 of the Mira river, connecting the outcrops on the Bengal road with 

 those near the mouth of Canoe brook. 



Johannian Division. 



Johannian Except a narrow band in the valley of Young brook near George 



Ewig^slzuid 111 r i ver station, this group is first seen at the western point of a little cove 



passage. inside of Young point, at the eastern end of the Long island passage. 



A quite low cliff here consists of flaggy sandstones with some thin beds 



of dark gray shale. They dip S.E. mag. < 30. There are layers 



covered with trails of Ctenichnites, burrows of Monocraterion and trails 



and casts of worms ; also small, poorly preserved Lingulellas and an 



Obolus. Between the Acadian beds and these are some heavy beds 



of dark gray sandstone or quartzite. 



Faulted in along the border of the Coldbrook felsites on the south- 

 eastern side of Long island and at the south-western end of the island 

 are certain conglomerates and sandstones of Cambrian age. On the 

 south-east side of the ferry these sandstones dip S. 30 E. mag. < 80, 

 and have ripple-marks and burrows of Arenicolites, &c. At the end 

 of the island the flaggy layers also show the pits and galleries of 

 Arenicolites, and dip S. mag. < 50. The conglomerates contain 

 pebbles and boulders of weathered gray felsite, pale green slaty 

 felsite, and vesicular felsites similar to the rocks of the Coldbrook 

 terrane in this part of the island. They also contain fragments of 

 black flinty slate, like that of the pre-Cambrian terrane on the western 

 side of the island. 



On the opposite side of the Long island passage the Johannian 

 division holds the shore from near Young point to the Long island 

 ferry, with prevailing dips to the south-east. The beds stand 

 mostly at high angles, and wave-marks and other indications show 

 Fossils. ^at some of them are overturned. They hold beds of small Lingu- 



lellas, and a Beyrichia also occurs. Some of the flags have wave- 

 marks ; others are fretted with ripple-marks and worm trails ; others 

 again have burrows of Arenicolitee and Monocraterion, and a few 

 have trails of Eoichnites. 



