"The Middle Green shales in the thin lime- stone around in Helsona and on these slats seem thus brachydors, but they are far less numerous than before. In the ferruginous layers Helsona are increasingly dominant, and while they are also present in the upper green shale they are failing abundant. Of the Queenston deposits about 250 feet can be seen about the station of the Forks of Credit. They are all brick-red beds with an occasional green grey band in it or so in thickness. The first of the red beds appear at Streetsville Junction 21 miles away to North. Parts suggest the name Cataract for these "Clinton" beds because they are well ex- plosed in the Cataract of the Credit which is written a half mile of the Cataract Junction of the C.P.R. The Niagara Cuesta can be traced all the way from Niagara to Collingwood. The C.P.R. climbs of the Cuesta from a little west of