378 



At the junction of Wright and Gooderich streets are 

 exposures of dark greenish slates and many beds of fine 

 sandstone. The strata dip southwards at angles of 70° 

 to 80°. These measures belong to the Johannian division. 

 Northward along Gooderich street, a progressive change 

 takes place in the strata, the sandstone beds are thinner 

 and fewer and the slates darker in colour. Towards the 

 head of the street, the strata are mainly dark slates with 

 thin, disrupted beds of fine sandstone. These measures 

 belong to the Acadian division. 



At the northwest corner of the junction of Seely and 

 Wright streets are exposed remnants of fossiliferous shale, 

 though this is not now a good collecting place. The 

 common fossils still to be obtained are; Paradoxides 

 eteminicus, Ctenocephalus maUhewi, Liostracus tener Lin- 

 narssonia transversa, and Acrothele maUhewi. Some years 

 ago, members of the Protolenus fauna, including Pro- 

 tolenus paradoxides, were found by Mr. J. E. Narra- 

 way between the above fossiliferous layer and the white 

 sandstone at the back of the quarry, but this outcrop is 

 no longer available. The strata belong to the Acadian 

 division and by Dr. Matthew are regarded as the 

 equivalent of the Lower Cambrian of other regions. By 

 Dr. Walcott and others, the fauna is held to be of Middle 

 Cambrian age. 



In the low rocky mound and small quarry at the head 

 of Gooderich street, there are exposed to the north of, and 

 therefore below the fossiliferous shales, about 70 feet 

 (21 m.) of nearly vertical shales and sandstones. These 

 are succeeded by a 20-foot bed of white, comparatively 

 coarse sandstone. Beyond this distinctive sandstone 

 bed are exposures of dark grey and purplish sandstones 

 and shales with one thin bed of white sandstone separated 

 from the main bed by about one foot of the dark rocks. 

 A thickness of about 50 feet (15 m.) of the dark sandstones 

 and shales is exposed. To the north, after a concealed 

 interval of about 60 feet (18 m.), rises a low ridge of dense, 

 green trachyte belonging to the Pre-Cambrian. The 

 strata in general strike to the southwest and dip at very 

 high angles to the southeast. In spite of local slips and 

 warpings in the beds, the whole series appears conformable. 



The massive bed of white sandstone marks the base 

 of the Acadian. The dark grey and purple sandstones 



