Sandquist limestone. There is a complete transition from the Williamson shale in that there comes of limestone appear at the top of the latter, and the limestone became once and once dominant and in thicken his upward throughout the Sandquist. Finally at the top there is a first come of blue shales and then comes in somewhat sharply the thin limestone series of the Rochester shale. The thickness is 18 feet. Clinton limes. Just below the Driving Point Bridge on the east bank one sees one of these cups. It begin down in the Sandquist about .5 feet and extends out more than 3 feet into the Rochester, have a photo of it. Top of Medina. There is an absolute sharp con- tact between the Grey Band of the Medina and the Jordan shale. I stuck my knife in at the contact and found it to be as sharp as can be. On one side is the white sandstone and on the other fine green shale. Beneath the Grey Band are heavy beds of impure red sandstone more or less mottled. These have marlins 4-Authophycus, archimedes