Collingwood shale on Hurmian quartzite. Near Sheguiandoh, Manitoulin. Sheguiandoh Shales, dip S. dip N. about 30° Shells E. The contact lies 112 feet above the lake and from Collingwood all the way to the lake level. As the C. is not over 60 feet thick this shows how it rises and overrides the Hurmian due to the Monadnock in the sea. On one place that but the shale against the quartzite is full of angular fragments of the latter. Also the material wattled loose are riddled down the slope into the sand of the sea. None of these pieces are rounded or water worn. There is Collingwood shale to the north and to the south of the Huronian quartzite. To the south one does not at once see more than the Collingwood but to the north the Eden soon appears and after about one mile more the Richmond. I would interpret the array of this monadnock as follows: