168 D. WHITE — RELATIVE AGES OF KANAWHA-ALLEGHENY SERIES 



m 



and (3) the Stockton seam. They have been respectively correlated and 

 named by the geologists of West Virginia as identical with the Upper 

 Kittanning, the Lower Freeport, and the Upper Freeport of the Allegheny 



valley. 



Plants from the Kanawha Mining and Coalburg coals. — The roof shales 

 of the Kanawha Mining and Coalburg coals do not appear generally to 

 contain well preserved plants. From the rock dump at the Chesapeake 

 mine, Lower creek, near Handle}', specimens of Lepidodendron modu- 

 lation Lx. and a Sigillaria belonging to the mamillaris group have been 

 obtained. Lepidodendron modtdatum affords a slight indication of Alle- 

 gheny age, although the Lycopodiales of the Carboniferous flora are 

 of inferior stratigraphic value. The plant fragments from the horizon 

 of the Coalburg seam at the Belmont mine, near Crown hill, and at 

 Ronda, on Cabin creek, represent a very delicate, deeply dissected Sphe- 

 nopteris, more lax than Sphenopteris hildreti Lx. ; a Sphenopteris of the 

 form identified in the unpublished work of Professor Lesquereux as 

 Sphenopteris delicatula Bronn ; two species of Neuropteris, one of which 

 is probably identical with Neuropteris flexuosa Sternb., while the other 

 belongs to the group represented by Neuropteris gigantea Sternb., Cata- 

 mites suckowii Brongn., and Lepidodendron cf. obovatum Sternb. The 

 plant representations from the levels of these two coals are too scanty 

 to permit an attempt at correlation. They contain little that points dis- 

 tinctly to a position in the Allegheny series, while, on the other hand, 

 the fern species differ in their facies from the forms in the Clarion or the 

 higher groups in northwestern Pennsylvania. 



Plants in the roof of the Stockton coal. — The Stockton coal, which has 

 been identified with the Upper Freeport coal of the Allegheny valley by 

 Doctor I. C. White, and has according^ been made by him the topmost 

 stratum of the Alleghen}^ series in his correlations of the terranes along 

 the Kanawha river, lies from 30 to 50 feet below the Black flint, beneath 

 which the upper boundary of the Kanawha formation is drawn by Messrs 

 Campbell and Mendenhall. 



The plant collections from the roof of the Stockton coal at a number 

 of localities t include the following species : 



Name. Locality. 



Pseudopecojjteris cf. nummularia (Gutb.) * Lx Bel., Buflf., Sp. 



Mariopteris muricata (Schloth. ) Brongn Hur. 



" nervosa (Brongn.) Zeill..J Bel. 



tBelmont mine, near Crown hill (Bel.) ; Buffalo Lick fork, five miles above Cannelton (Buff.) ; 

 near the mouth of Hurricane creek (Hur.) ; Stanton mine on Kelleya creek (St.); Spanglers fork 

 of Blue creek (Sp.), and from the drift back of the schoolhou.se north of Pond gap (P. G. ). 



| Form characteristic of the Allegheny series. 



