with conifer, quaking aspen etc. Flowers and beautiful ones abound everywhere in the vicinity of springs, creeks and rivers. The mountains are made of crystalline and eruptive rocks supposed to be of Algon- Kian age. I had a long talk with Prof Knight and one of the remarks are they mentioned in the first thickness of the Cretaceous strata, The Laramie is said to be 7000 feet thick and a similar thickness for the Fox Hills or Fort Pierre. The present mountains are Post Cretaceous since they lyeth through the Cretaceous deposits! This is the opinion of Prof. Knight. A more probable structure is the elevation of the Medicine Bow & Laramie butts in highland area with rapid erosion and deposition in the valleys or between the mountains. With the introduction of the Laramie then was another physical change beginning with a great conglomerate and boulders as large as a man. This one