Hamilton, Monday August 18-19/13 Started out John street south to the Mountain. At the head of the Mountain be- side the road one sees a good exposure of of the base Lockport over the Rochester shale. the The Lockport at base consists of thin bedded crystalline, cavernous [pinks] dolomite without chert for five feet. In the next 18 inches there are a few chert nodules and then the gray-white then bedded fine grained dolomites, deflute and chert nodules and chert stringers. At the very base of the Lockport there is a thin rim-pyrite sometime fine grained sand, 1 from 1/2 inch to 3 inches thick. On this follows a dolomite bed from 2 to 4 inches thick, crystalline, slightly sandy, pyritiferous and with shale pebbles included that are up to one inch in diameter. descended from the Rochester below. There is no transition between the Rochester and