59 



SECTION No. 11.— EAST SIDE OF RIVER, 200 YARDS SOUTH OF BRIDGE OPPOSITE 

 THE PROPERTY OF THE TORONTO MILLING COMPANY (436 to 450) 



Upper Erindale Member: Thickness 



feet 

 Massive beds of hard, calcareous and arenaceous shale, separated by 

 soft, fissile, clay shale. Three feet above the water-level there is a bed 

 of argillaceous sandstone, showing contorted' pillow structure with con- 

 temporaneous erosion of underlying beds. The following fossils were 

 found in a limy layer about seven feet above the water-level: Hotno- 

 trypella hospitalis, Stigmatella crenulata, Zygospira modesta, Rafi.nesqu.ina 

 alternata Modiolopsis concentrica, Pterinea demissa, Byssonychia sp., 

 Isotelus sp 14 



SECTION No. 12.— WEST SIDE OF RIVER NORTH OF CANADIAN PACIFIC RAILWAY 



BRIDGE (460 to 483) 

 Streetsville Member: Thickness 



feet 

 In descending order: — 



(4) Alternating limestone and shale belonging to the zone of Homo- 

 trypa streetsvillensis. See Section No. 13 below. The bottom of the pro- 

 jecting, massive bed of limestone (485) was determined by hand .level 

 to be 23'/2 feet above the water-level 8 



Upper Erindale Member: 



(3) Grey, fissile shale, marking the top of the Erindale member. 

 One bed of argillaceous sandstone contains: Rafinesquina alternata, 

 Stigmatella crenulata, Clidophorus planulatus, Pterinea demissa, Atactopora 

 sp., Lophospira sp., Byssonychia sp 5 



(2) Grey, fissile shale with one thin layer of limestone and a few 

 inches of brownish-coloured shale, containing: Hebertella occidentalis, 

 Rafinesquina alternata, Platystrophia clarkesvillensis , Zygospira modesta, 

 Hallopora aequalis, Hallopora cf. onealli, Hallopora onealli, H. creditensis, 

 Stigmatella cf. lambtonensis , Byssonychia sp., Isotelus sp 5 



(1) Grey, fissile shale with a few thin layers of limestone extending 

 to water-level. The surfaces of these limestone layers are covered by the 

 zoaria of the cryptostomatous bryozoan Rhinidictya parallella. Three 

 feet above the water-level, there is a layer of argillaceous sandstone show- 

 ing contorted pillow structure with contemporaneous erosion of the 

 underlying shale ' 5 



In the talus at the bottom of this cliff the following species were 

 found: Byssonychia radiata, Rafinesquina alternata subcircularis, Platy- 

 strophia clarkesvillensis, Hebertella occidentalis, Anoptera cf. miseneri, 

 Pasceolus cf. camdenensis. 



SECTION No. 13.— EAST SIDE OF RIVER, 600 YARDS NORTH OF SECTION No. 12 



(475 to 492) 



Streetsville Member 

 Stromatocerium Reef: Thickness 



feet 

 In descending order: — 



(6) Clay with Stromatocerium huronense large and abundant, Tet- 

 radium approximatum, Columnaria alveolata, Heterotrypa simplex, and 



Homotrypella hospitalis 5'/2 



(5) Thin limestone bands alternating with shale containing: Colum- 

 naria alveolata, Stromatocerium huronense, Heterotrypa simplex, Hallopora 

 maculosa, and Homotrypella hospitalis peculiaris % /i 



Zone of Homotrypa streetsvillensis: 



(4) Thin limestone bands, alternating with shale. A few examples of 

 Homotrypa streetsvillensis are found and hence the interval is provisionally 

 included in the zone of H. streetsvillensis. The fauna includes: Heber- 

 tella occidentalis, Byssonychia sp., Homotrypella hospitalis, Stigmatella 

 interporosa, Monticulipora parasitica multipora, Homotrypella hospitalis 

 peculiaris, Hallopora onealli creditensis, Platystrophia clarkesvillensis, 

 Byssonychia cf. grandis, Byssonychia radiata, Lophospira sp., Heterotrypa 

 simplex maculosa 3 



