WHITE.] 



AGE OF THE COALS IIST LORBEREY GAP. 



835 



trustworthy, on account of the liabilit}' of transportation along the 

 outlet of the valle}'. The species are as follows: 



Neuropteris Scheuchzeri Hoffui. 

 Neu^()pteri^^ Clarksoni Lx. 

 Neuropteris intlata Lx. 



Neuropteris Desorii Lx.? 

 Odontopteris sp. 

 Linopteris obliqua (Bunb. ) . 

 Annularia stellata (Schloth.) Wood. 

 Annulariasphenophylloides (Zenk. ) Gutb. 

 Sphenophyllum emarginatum Brongn. 

 Sphenophyllum euneifolium (Stern b.) 



Zeill.? 

 Lycopodites Erdmanni [Lx.]. 

 Lepidodendron dichotomum Sternb.? 

 Lepidodendron niodulatuui Lx. 

 Lepidostrobus Geinitzii Schimp.? 

 Lepidophyllum oblongifolium Lx. 

 Lepidophyllum affine Lx.? 

 Lepidophyllum majus Brongn.? 

 Rhabdocarpos niultistriatus (Presl) Lx. 

 Rhabdocarjios jaeksonensis Lx.? 



Mariopteris sp. 



Mariopteris ef. Sillimanni (Lx.). 

 Sphenopteris sp. (nov.?). 

 Sphenopteris cristata Brongn.? 

 Sphenopteris of. flagellaris Lx.? 

 Oligocarpia missouriensis D. W. 

 Aloiopteris serrula (Lx.). 

 Pecopteris dentata Brongn.? 

 Pecopteris unita Brongn. 

 Pecopteris notata Lx. 

 Pecopteris cf. pusilla Lx. 

 Pecopteris oreopteridia (Schloth.) Sternb. 

 Pecopteris polymorpha Brongn. 

 Alethopteris aquilina (Schloth.) Goepp. 

 Alethopteris pennsylvanica Lx. 

 Callipteridium cf. Mansfieldi Lx. 

 Neuropteris minor Lx. 

 Neuropteris ovata Hoffm. 

 Neuropteris vermicularis Lx. 

 Neuropteris timbriata Lx. 

 Neuropteris cajiitata Lx. 



A somewhat crude representation of the terranes in the Lorberr}^ 

 Gap including the coals referred to is shown on PI. CLXXXY , Fig 3. 

 In this section the ''South" and "Peacock" coals are those mapped 

 as Lykens coals Nos. 6 and 4, respectively, on the mine sheets. 



Since the proximity of the Lower Coal Measures to the red shale 

 clearly indicated the disappearance of a part or the whole of the Potts- 

 ville formation by faulting, a stratigraphic study was next made of 

 Sharp Mountain in this district. The results of this examination will 

 be stated only in brief form, since the local stratigraphic conditions 

 are apparent when once the presence of a fault is recognized. 



THE FAULT IN SHARP MOUNTAIN. 



The section of the Pottsville formation at Rausch Gap, Schitylkill 

 County, shown on PL CLXXXV, Fig. 1, has been found to be normal, 

 the formation being about 1,200 feet thick, and the lower coals, discussed 

 on an earlier page, also found to belong to the Lower Lykens group. 

 Proceeding westward from Rausch Gap,^ which is a little over 1 mile 

 from Lorberry (jap, the protruding edges of the nearly vertical hard 

 conglomerates of the upper part of the formation may be readily 

 traced for a short distance along a sharp knob. However, at al)out 

 one-third of a mile from the gap the ledges b(K;ome crushed, and the 

 knob, topographically shown on mine sheet xxi, and on the Pine Grove 



1 This gap must not be confused with that of the same name farther west, along Sharp Mountain^ 

 in Lebanon County, or with that in the north side of the Wifonisco Basin, formerly incorrectly 

 designated Kliiigors (ia|>. ami in a later State report Kohlers Gap. 



