820 



FLOKAL ZONES OF THE POTTSVILLE FORMATION. 



(E) Altumont folliorv No. 2: Stution 87, PI. CLXXX. On the top 

 of Broad Mountain, between Morea and Frackville, close to the north- 

 ern edge of the Southern field, near the point where the Pottsville 

 formation ])rid<j;vs the g-ap between the latter and the Western ^liddle 

 field, the Buck Mountain and manunoth coals have been mined in a 

 shallow basin at the now abandoned Altamont collier}- No. 2.' The 

 material from the shafts in the Buck Mountain coal contains tlu^ fol- 

 lowing species: 



Mariopteris cf. Sillimanni (Lx.). 

 P>!eiKlopecopteri8 squamosa (Lx.). 

 Xeuropteris Sehenchzeri Hoffm. 

 Annularia stellata (Schloth.) Wood. 

 Splieiiophylluiu cuneifoliuni (Sternb.) 



Sphenophyllum emarginatum Brongn. 

 Lepidodendron vestitnm Lx.? 

 Lepidocystis (Sigillariostrobus?) quad- 

 rangularis Lx.? 



The combined flora from these typical localities of the Twin or 

 Buck Mountain coal is o'iven in the followins' list: 



Mariopteris sphfuopteroides (Lx.) Zeill. 

 Mariopteris muricata (Schloth.) Zeill. 



var. nervosa (Brongn.) Kidst. 

 Mariopteris cf. Sillimanni (Brongn.). 

 Pseudopecopteris squamosa (Lx.). 

 Pseudopecopteris obtusiloba (Brongn.) 



Lx. 

 Sphenopteris pseudomurrayana Lx.? 

 Sphenopteris nummularia Gutb.? 

 Si)henopteris (n. sp.?) . 

 Sphenopteris mixta Pchimp. 

 Sphenopteris suspecta D. W.? 

 Oliogocarpia cf. Brongniarti Stur. 

 Pecopteris dentata Brongn. 

 Pecopteris arguta Sternb. 

 Pecopteris unita Brongn. 

 Pecopteris villosa Brongn.? 

 Pecopteris oreopteridia (Schloth.) Sternb. 

 Pecfjpteris penmeformis [Lx.]. 

 Alethopteris aquilina (Schloth.) Goepp. 

 Alethopteris Serlii (Brongn.) Goepp. 

 Callii)teridium Grandini (Brongn.) Lx. 

 Xeuropteris rarinervis Bunb. 

 Neuropteris ovata Hoffm. 

 Neuropteris plicata [Lx.]. 

 Neuropteris capitata Lx. 

 Neuropteris vermicularis I.,x. 

 Neuropteris fiml)riata Lx. 

 Neuropteris Scheuchzeri Hoffm. 

 0<lontopteris cf. osmundajformis 



(Schloth.) Zeill.? 

 Calamites Suckowii Brongn. 



Calamites Cistii Brongn. 



Cyclocladia sp. 



Asterophyllites equisetiformis (Schloth.) 



Brongn. 

 Annularia stellata (Schloth.) "Wood. 

 Sphenophyllum emarginatum Brongn. 

 Sphenophyllum cuneifolium (Sternl).) 



Zeill. 

 Sphenophyllum fasciculatum (Lx. ) . 

 Le2)idodendron Brittsii Lx.? 

 Lepidodendron niodulatum Lx.? 

 Lepidodendron vestitum Lx.? 

 Lepidodendron sp. indet. 

 Lepidostrobua cf. variabilis L. & H. 

 Lepidostrobus cf. Geinitzii Schimp. 

 Lepidophyllum cultriforme Lx. 

 Lepidophyllum oblongifolium Lx. 

 Lepidophyllum cf. INhmsfieldi Lx. 

 Lepidophyllum affine l.,x.? 

 Lepidocystis vesicularis Lx. 

 Lepidocystis (Sigillariostrobu.s?) quad- 



rangularis Lx. 

 Sigillaria cf. Brardii J5rongn. 

 Sigillaria tessellata (Steinh.) Brongn. 

 Trigonocarpum oliva?form(' L. i*i H.? 

 Rhabdocarpos sp. 



Rhabdocarpos nuiltistriatus (Prt'sl) bx. ' 

 Rhabdocarpos mamillatus Lx. 

 Cordaicarpon ciuctum Lx. 

 Carpolithes transscctus Lx. 

 Carpolithes cf. t'llipticus Sternb. 



'Atlas Southern Anthracite Field, Pt. II, mine sheet xiii; Pt. V, cross-.sectidn sheets v-viii, section 

 16; Pt. IV, columnar-section sheet ix: Finiil Summary Report, Vol. III. Pt. I, p. UOSO. 



2 Broad, rigid, thick-nerved type present in the lower portions of the Allegheny .series (^XIII): 

 Lower I'ruductive Coal Measures. 



