Marylaxd Geological Survey 517 



Jennings Fokmation 

 Parkheacl Sandstone Member 



c3 o ^ +-• ;^ a 



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Road N. 80° W. "g S c gf „ - 3 



Shale chiefly dark and bands of flaggy sandstone. At 

 the top occur Chonetes scitulus common, Productella navi- 

 celliformis common, Spirifer marcyi var. superstes abun- 

 dant, TropidolepUis carinatus abundant, Liopteria bigsbyi, 

 Orthoceras sp 1908 72.9 1466 



Fissile shale, green below, grading into black above. At 

 top occur CamarotoecMa congregata large, Lingula oherni 

 abundant, Liorhynchus mesascostalis abundant, Orbicu- 

 loidea cf. media, Rliipidomella vanuxemi, Spirifer (Del- 

 thyris) mesacostalis ?, cf. Ptychodesma sp., Leptodesma 

 naviforme 1812 76 1393 



Road N. 22° W. 

 Woodmont Shale Member 



BEDS CONTAINING NAPLES FAUNA 



Green fissile and splintery shale 1712 21.2 1317 



Sandstone with shale partings. Dip 50° W 1662 7.6 1296 



Shale and flaggy sandstone 1644 13.6 1288 



Concealed 1599 26.3 1274 



Road N. 55° E. 



Concealed 1549 44 1248 



Fissile olive-green shale and flaggy sandstone 1479 31.4 1204 



Fissile olive-green shale weathering to ashen-white 1429 47.2 1173 



Road N. 55° W. 



Fissile olive-green shale weathering to ashen-white 1354 43.2 1125 



Fissile olive-green shale 1304 39.7 1082 



Green shale breaking irregularly. Dip 70° W 1258 43.2 1043 



Road N. 95° W. 

 Concealed 1208 40.4 999 



Road N. 70° W. 

 Fissile green shale. N. 12° E. 65° W 1161 131.3 959 



Road N. 95° W. 



Green fissile shale 1014 127.7 828 



Green fissile shale bearing at top Pterochemia sp 864 34 700 



