"that all the slates that we have seen today and yesterday are of Lower Cambrian age. We have now seen about 2000 feet of Lower Cambrian slates, and Keith says the whole seam is about 3500 feet thick. A light green but an intense ore, and a grey-green color make up the bulk of the slates. Thin limestones are interspersed near white quartzites, usually thin - from a half inch to two or three inches thick - but at times considerably ticker. Limestones are much rarer and come in guns. One gun of them reddish limestone is about 15 feet thick, and a Hard Shale gun has then reddish limestones less crumpled. For thickness this Hard Shale is later on than Of purplish and red slates there are at least three; one is about 20 - 30 feet thick, and of the other one I do not know. the thickness. The scarcity of the fossils is rather striking and is hard to explain. They may be more common than appears, due to the crumpled ``` ```nature of the lamination of the red and purplish ```