121 



Miles and 

 Kilometres. 



98-56111. Rockwood — Alt. 1,182 ft. (370 m.). East- 

 135 km. ward from Guelph, the Niagara limestones are 

 exposed at several places. To the west of 

 Rockwood the strata are thin, but east of that 

 place the heavier dolomites are exposed. Fossils 

 are not well preserved in these rocks but the 

 following species are comparatively common: — 

 Favosites gothlandica Lamarck 

 Halysites catenulatus Linnceus 

 Rhynchotreta cuneata americana Hall 

 Spirifer niagarensis (Conrad) 

 Trematospira camura (Hall) 

 Fenestella sp. 

 Bellerophon sp. 

 Pterinea sp. 

 Cyrtoceras sp. 

 Orthoceras sp. 

 109-63 m. Limehouse — Alt. 1,002 ft. (304-6 m.). The 

 175-4 km. upper shales of the Cataract formation are 

 exposed in the railway cut at Limehouse: 

 above these, the lower members of the Niagara 

 may be seen. North of this place the basal 

 sandstone of the Cataract is exposed over a 

 considerable area and finally passes under the 

 other members in the face of the cuesta. 

 107-8 m. Georgetown — Alt. 846 ft. (257 m.). The 

 172-5 km. red shales of the Richmond formation are 

 exposed in the river valley at Georgetown. 

 No further rock exposures are seen before 

 crossing the Humber river where the Lorraine 

 shales are exposed. 

 136-89 m. Toronto — Alt. 254 ft. (77-2 m.). On ap- 

 219-2 km. proaching the city, the post-glacial sands may 

 be seen between Lambton and Parkdale. 



BIBLIOGRAPHY. 



Hagersville. 



1. Ami, Henry M. Synopsis of the Geology of Canada. 

 Can. Roy. Soc, Proc. and Trans, 

 new ser., vol. 6, sect. 4, pp. 187- 

 225, 1900. 



