BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 11, pp. 145-178 March 28, 1900 



RELATIVE AGES OF THE KANAWHA AND ALLEGHENY 

 SERIES AS INDICATED BY THE FOSSIL PLANTS* 



BY DAVID WHITE 



{Read before the Society December 29, 1899) 



CONTENTS 



Page 



Introduction 146 



Floras of the Allegheny series 147 



Type sections of the series and its subdivisions 147 



Clarion group 148 



Plant beds of the group 148 



Plants of the Clarion group 149 



Kittanning group 150 



Plant beds of the group 150 



Species from the Kittanning group ... 151 



Freeport group 153 



Plant beds and localities , ... 153 



Species from the Freeport group . . 154 



General characteristics of the Allegheny floras - 155 



Floras of the Kanawha series 157 



Typical region and thickness of the formation 157 



Division of the Kanawha coals into two groups 157 



Composition of the groups ..... 157 



Floras of the lower group of coals 1 60 



Localities 160 



Plants at the horizon of the Eagle coal . 161 



Plants accompanying the higher coals of the lower group 162 



Relative ages of the Lower Kanawha group and the Allegheny series. 165 



Floras of the upper group of coals in the Kanawha formation 167 



Plant horizons 167 



Plants from the Kanawha Mining and the Coalburg coals 168 



Plants in the roof of the Stockton coal . 168 



The Stockton coal flora an Allegheny flora 169 



Floras succeeding the Kanawha formation 170 



Species less than 200 feet above the " Black Flint " . . 170 



Plants 200-300 feet above the " Black Flint " 171 



Species 300-400 feet above the " Black Flint " 172 



Allegheny floras above the "Black Flint " 172 



* Published with the permission of the Director of the U. S. Geological Survey. 

 XXI— Bull. Geol. Soc. Am., Vol. 11, 1899 (145) 



