U. S. GEOLOGICAL SURVEY 



TWENTIETH ANNUAL REPORT PART II PL. CLXXXVI 



FIG. 1. Fishing Creek G.\p, Two Miles 

 North of Ellwood. Pexnsyi.va.ni a. 



Section including the coals opened 

 within 500 feet of the red shale on 

 the east side of the jiup. Datum line 

 is lower coal mined. 



1 inch = 200 feet. 





■ ^.opiOOOOf c 



240'. 



Coal I mined 1. 



(The horizon of this 

 coal is probahly 400 ± 

 feet above that of the 

 Twin bed. I 



100'. Ked shale! 



Fig. 2. Black Spring Gap (MorNT 

 RAGLE). Lebanon (Bounty. Pknnsyi.- 



VANIA. 



Section from the -Black Spring" coal 

 to the Mauch Chunk red shale, includ- 

 ing tile Pottsville formation and a 

 portion of the succeeding Coal Meas- 

 ures. Datum line is tlicapproxin)ate 

 horizon of the Twin coal. 



1 iiich = '.'OU feet. 







'■:Q% 



^Po(X9t 









■•6°P 





?.^o.<iio%''o^^- 



'e^^. 



'^^% 



=.0 Q-O-^o^nT.'i 



C (ml. ■ 



;to(K. 



Coal. Twin. 



TUP OF POTTSVII.I.E. 



Massive conglomerate 



Coalf 



aoo'. 



Maili-liClniMkrcilshal.' 



3. Gold Mine Gap, Lebanon 

 County. Pennsylvania. 



Section showiiij 

 thc'Tottsv illc 



tioll 111 tlic MM 



Uatuni line is 



of the Twin CO 



1 inch =2(1(1 feet. 



exposed telTUI 

 oiiiiation and 

 lvint;C..al Mca 

 i|ipi-oxima tc hoi'izon 



p.jr- 



Fi-q aVP-Q-".* 





('oal. "(Tray." 



.yoo'. 



Coal, •■ Heister. 



■<0 'C.-O'O 

 „-o„ i.'.o.o.o'» 



,°:°'oc''o' 







b'=-o°i°oc"oV.Q 



l.,310'. Coal! 



i,3wr. 



Coal. -Tliree-ft 



Coal ; 

 700'. 



Coal ? 

 Coal. 



Coal, " I*ea<'ock." 



Coal. ■•KMiir-fi 

 20U'. 



= Dark shale. 



Coal, Twin. 



■d on 1^1. CLXXXVII, fig. 1.) 



SECTIONS AT FISHING CREEK GAP, BLACK SPRING GAP, AND GOLD MINE GAP 



