Dundas [illegible] August 18-1913 Electric cars from Greyham, 15 minutes after the train. Left at 2:15. Dundas is 5 miles to the north-northwest of Hamilton. A peak quarry in the top of the mountain in the high Ledge Park. About 100 feet thick seen here. On the iron quarry level, the cut into the upper Cataract. On sees about 10 feet of green shales with some limestone bands. Then about 11 feet of brick red shales with some slightly harder bands, followed by the third green shales 7 about 3 feet. Over these occur more green shales with harder lining beds interbedded with a further thickness of 6 feet. At first I put these in the Medina but they are more probably of Cataract time. If this is so then the Cataract above the red beds is here far thicker than at Hamilton (18 inches). It may be better to regard these 6 feet as Medina and lay the thickness about 12 to 13 feet.