790 FLOKAL ZONES OF THE POTTSVILLK FORMATION. 



Analiisif! of till.' (llt<lfibi(tio)i of Die upeciex hij divisions in llu: formation. 



FLORAS OF THE LOWER LYKENS DIVISION. 



Before discussino- the probable equivalents or approximate horizons, 

 with reference to either the Lykens coals or the type section of the 

 formation, of the more or less isolated beds or developments in the 

 southern portions of the anthracite field, including- those enumerated 

 in the section of the table to the right of the Pottsville Gap beds, it is 

 desirable to indicate as clearly as is practicable, without recourse to 

 paleontologic descriptions, those species which, so far as has been 

 observed, are apparently largely characteristic of the principal levels. 

 It is also advisalde to enumerate those which appear to especially 

 attend and mark the vicinity of the economically important and there- 

 fore more interesting horizons of the several Lykens coals. The latter 

 mav be reviewed in ascending order. 



FLOE A OF THE •'ZERO*' AND NO. COALS. 



Of the characters of th(> plants over the "zero"" 1)0(1. the lowest of the 

 Lykens coals, no precisti information is at hand. At Willianistown.' 

 the onh" point at which the l)ed has l)een exploited, but little mining 

 was ever done in the coal, and the bed was so long ago abandoned that 

 it has not been practicable to obtain any fossils therefrom. It appears 

 prol)alde, however, on account of its proximity to the succeeding coals 

 (38 feet below No. 6), that little difference will be observed in its flora, 

 fragments of which may possibly have been gathered from the rock 

 dump at the Williamstown mine. Likewise the mingling of the roof 

 shales from the Lykens coals No. 0, or the "Little l)ed,'"' and coal No. 5, 

 in th(> rock dumps, as at Big Lick, AVilliamstown, and the Brookside 

 mines, renders it, for the most i)art, impossible to discrimiiiat(> l)et\veen 

 the fossils from tliese coals at this point, although it has fortunately 

 been possible to procure distinct colkn-tions from the higher coal. A 

 small collection from the roof of Lykens coal No. (t, within the mine 



'Atlas Southern Anthracite Field, Pt. Ill, mine sheet xix; Pt. VI, cross-section sheet xx: Pt. IV, 



columnar-section sheet vii, section 8. 



