While changes run into on one lying oratus, lime stone and then magnesia limestone. According therein we have here a at firstly, and there- fore due in the area of the meeting of the mother sea with the Arctic or Gulf sea. Cataract. Whirlpool sandstone at base. days Over it lies thin bedded fissile blue shales for fath, then a zone of the same shale only a few mus thousands of impure dolomite dividing the fauna I collected some years ago, about 5 fath thick, followed by once shale of the same characters for 19 feet. Then 5 fath zone of thin bedded dolomitic limestone with a brief sandstone between the top, the limestone limestone reflects onto Oreltonia and almost no shale fartings. Lots of Lajula payments. Mayhara & cuneata. Then once blue shales for 3 feet above then sandstone and red shales of the Medina appear. I would say the Ordovician therefor 32 feet above the Whirlpool. It is due that the Medina sandstone, There in our head here between the Cataract and Ordovician. Then is best seen in the