852 FLORAL ZONES OF THE POTTSVILLE FORMATION. 



Avhich. as ^vill at oiu-o be clLscovenul in ulancino- at the list, arc dis- 

 tiiKtlv of I'ottsville ao-o: 



Asterophyllites arkangamis. 

 Annularia acicularis. 

 Whittlef^eva elt'sians \ar. minor. 



^Iari<)i)teris tennesseeana. 

 Neuropterif! gigantea. 

 Xeuropteris acutimontana. 

 Neuropteris 8p. indet. 



Furthermore, nearly all of the species will be reeognized as having 

 a distribution in the Upper Lykens division. It is certain that this 

 flora can not be below the horizon of Lj'kens coal No. o, when Xciirop- 

 tei'k gigantea^ Asterophyllites arhinmnus, and the peculiar form of 

 Jfar/'opte/'is teiinesseeana strongly suggest a more intimate relation 

 with the flora of Lykens coal No. 2. It is probable that the level of 

 this flora is not lower than Lykens coal No. 2 or higher than Lykens 

 coal No. 1. 



B. Of the economic results obtained by the Bayard shaftings (Station 

 28, PI. CLXXX) we have no other information than that given by mine 

 sheet xxvi, which shows the location of four shafts, and by the fossils 

 obtained from the rock dumps. From the lower of the shafts there 

 were obtained an indeterminate species of Maviopteris^ Neurojyteris 

 Pvcahmtas var. inaequalk, and a species of Sporocy-'^tts. From a 

 higher shaft, not over 85 feet from the latter, the following-named 

 species were obtained in shale mingled with waste coal: 



Mari<ii)tt'ris pottsvillea. Lepidopliylluni (Hiinnimontanuiii. 



Neuropteri.s Pocahontas var. injequalis. i Rhabdocarpos acuminatum. 



A comparison of the.se florulas, both of which are distinctly refera- 

 ble to the Lower Lykens division, shows that while the plants from 

 the lower drift contain no types indicative of a particular horizon, the 

 species from the upper drift include, in Mariopteris pottsvillea^ Neu- 

 ■ropAeris Pocaliontnx var. iwpqwdix^ and Lepidojjhyllum quinnlmonta- 

 niDii, three species characteristic of the ^[ariopterk pottsvillea zone, or 

 the approxmiate horizon of Lykens coal No. 4. The association and 

 facies of the individual plants from this drift are clearly suggestive 

 of the level of the Kemble drift on Broad Mountain, which, as we 

 have alreadv seen, is most probal)ly near the horizon of Lykens coal 

 No. 4. If this correlation is valid, then it becomes probable that the 

 horizon of the lower drift is near the level of Lykens coal No. 5. 



C. The next locality at which fossil plants were obtained is a pit 

 just above the "north vein drift" (Station 29, PI. CLXXX), close to 

 the divide in the saddle of the mountain, nearly due north of ^^'hite 

 Springs Station. The drift at this point was opened in 1827 for the 

 distance of 100 feet on a dip 30° S. As might be expectiul. nearly 

 all of the excavated material is now entirely disintegrated. Such i)lant 

 fragments as were obtained plainly show the presence of a number of 

 species which, though not clearly indicative of the approximate hori- 



