a 





15 



2636 



31 



2621 



1.9 



2590 



Maryland Geological Survey 499 



S ii M r ^ 



Massive flaggy sandstone and interbedded shale 3759.5 



Fissile green shale and interbedded sandstone 3738 



Red sandstone 3690 



Fissile olive-green shale and beds of sandstone. Dip 



45° E 3687 92.5 2588 



Coarse olive-green shale. In a sandstone at top occur 

 Spirifer disjunctus abundant, Cypricardella cf. rnary- 

 landica small, Cypricardella sp., Palwoneilo sp., cf. Schizo- 



dus Chemung ensis, S. oJierni ?, Bucanopsis mwra 3545 21.7 2496 



Coarse green fissile shale and interbedded sandstone. 



Dip 48° E 3513 23.8 2474 



Spring and ravine 3478 



Coarse green fissile shale and bands of sandstone. At 

 the top in coarse arenaceous shale are found Spirifer mesas- 



trialis abundant 3478 59.2 2450 



Dark-green fissile shale and bands of sandstone. Dip 55° 

 E. At top in sandstone are found Leptostrophia perplana 

 var. alternata abundant, Palwoneilo perplana. cf. Schizodus 



oherni. Bucanopsis mwra 3398 75.3 2391 



Concealed 3298 88 2316 



Ravine 3173 



Concealed on railroad. On hillside are beds much the 

 same as in underlying unit. At top of this unit on hillside 

 are found Anibocwlia unihonata, Chonetes scitulus, Cyr- 

 tina hamiltonensis, Spirifer disjunctus abundant, S. mesas- 

 trialis common, 8. (Delthyris) mesacostalis ?, Schizodus 

 oherni common, Cyclonemina mxUtistriata, Cyclonema con- 

 cinnum, Cyclonemina crenulistriata abundant, C. crenulir 

 striata var. oisolescens, Loxonema styliolum abundant, L, 

 terebrum, Nucula corbuliformis, Palwoneilo plana, Pterinea 

 chemungensis, Schizodus trigonalis, Cypricardella crassa 1 

 abundant, Bellerphon clarki, Loxonema ? glabruni, Holopea 

 parva, Ectomaria marylayidica. These species are limited 



to a narrow horizon 3173 105.7 2228 



Concealed on railroad. On hillside are seen yellow fissile 

 shale, green where not weathered, and some sandstones. 

 At top of this unit are found Amboccelia lombonata, Lep- 

 tostrophia perplana var. alternata, Spirifer disjunctus 

 abundant, S. viesastrialis, Cyclonemina crenulistriata, Lox- 

 onema terebrum. cf. Cypricardella crassa, C. tenuistriata. 

 This is the lowest occurence of Spirifer disjunctus ob- 

 served in this section 3023 52.8 2122 



