BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 10, pp. 69-82, PL. 10 FEBRUARY 25, 1899 



PLANATION AND DISSECTION OF THE URAL MOUNTAINS 



BY F. P. GULLIVER 



(Presented before the Society August 23, 1898) 

 CONTENTS 



A reconnaissance 69 



Plan of paper 70 



Russian work 71 



Physiographic description of the region 73 



Contrast between central Russia and the Urals 73 



Chafranowa section 73 



The ridges 74 



The monadnocks 74 



The eastern slope 75 



Valleys in the Urals , , 76 



Planation 76 



Work of rivers . 76 



Work of the sea 77 



Planation accompanied by slow sinking of the land 78 



Planation at high elevations . 78 



Planation in the Urals 79 



Evidence of subaerial degradation 79 



Dissection at Ufa 79 



Grade-plains near Simsk 80 



Ust-Kataw dissection . 81 



Yurezusk plain 81 



Suka mountain 81 



Taganai sections near Slatoust 81 



Dissection west of Umen mountain 82 



Conclusions 82 



A Reconnaissance 



During the excursion of the Seventh International Geological Congress 

 to the Urals in the summer of 1897 the writer was enabled to make a 

 number of observations on the stages of dissection reached in various 

 parts of these mountains. Photographs were taken from many summits 



XI— Bull. Geol. Soc. Am., Vol. 10, 1898 (69) 



