. Bulletin of the Geological Society of America. Geology. 74 F. p. GULLIVER—PLANATION AND DISSECTION OF URAL MOUNTAINS Upland and to the valleys cut beneath it is shown in figure 2. There are a few isolated summits rising a few meters above the upland in this Figure 2.—Chafranowa Section. The valleys in the present stage of dissection are about in adolescence. THE RIDGES After one has passed Ufa the character of the upland is changed from a broad, irregular, inter-stream upland to a succession of upland ridges, roughly parallel to the north and south axis of the Ural mountain fold- in
. Bulletin of the Geological Society of America. Geology. 74 F. p. GULLIVER—PLANATION AND DISSECTION OF URAL MOUNTAINS Upland and to the valleys cut beneath it is shown in figure 2. There are a few isolated summits rising a few meters above the upland in this Figure 2.—Chafranowa Section. The valleys in the present stage of dissection are about in adolescence. THE RIDGES After one has passed Ufa the character of the upland is changed from a broad, irregular, inter-stream upland to a succession of upland ridges, roughly parallel to the north and south axis of the Ural mountain fold- ing. These ridges represent the harder or more resistant rocks which have longer withstood the subaerial degradation. The view from the summit of almost any of them discloses the fact that each rises to nearly the same elevation as those on either side, and that the departures from uniformity fall into two classes. The first variation from uniformity is a progressive increase in elevation in going toward the center of the Urals. A tangent surface touching these ridges would arch gently from a few hundred meters near Ufa to some 1,400 or 1,500 meters where it rested on the Urenga ridge near Slatoust. So gentle is this arch, however, that at any one point the ridges seem to be in the same plane. The second class of variations are more irregular. Besides the vallej^s which are cut beneath this ridge plane there are a number of rock masses rising above the general level. THE MONADNOCKS In looking across the ridges from a number of different places it was seen that here and there a few points rise above the general summit level in any given localit^^ There are but few such rock masses along the western edge of the mountains near Ufa or Perm, but nearer the center of the mountain area these commanding peaks above the ridges were more and more frequently seen. Taganai is perhaps the best type of these higher summits. Three summits of resistant quartzite—Great, Little, and Middle T
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