532 



Butts — Geologic Section of Blair and 



Harrell 

 shale 



Hamilton 

 formation 



Marcellus 

 shale 



Onondaga 

 formation 



Bidgely 

 sandstone 



Shriver 

 limestone 



Helderberg 

 limestone 



Tonoloway 

 limestone 



Wills Creek 

 shale 



McKenzie 

 limestone 



Clinton 

 formation 



Dove and black fissile (paper) shale. Black at 

 bottom to west (Burket member). Black and 

 dove interbedded to east. Buchiola retrostriata, 

 Paracardium doris, Pterochaenia fragilis, Sty- 

 liola fissurella, Probeloceras lutheri. Lower 

 Portage. 



Hackly shale at top, weathers green; impure 

 limestone layers in top 10 to 20 feet. Dark shale 

 with thin even sandstone layers in middle to 

 west, three thick sandstone members to east. 

 Lower one-third dark olive shale grading into 

 Marcellus shale below. Chonetes aurora in 

 1 foot limestone at very top (Tully?, Upper 

 Devonian). Common Hamilton fossils abun- 

 dant in "hackly shale in upper one-third. Fossils 

 scarce below. 



Black fissile shale with Leiorhynchus limitaris 

 and Styliola fissurella. 



Dark shale with limestone layers. Odontopleura 

 aegeria, Anoplotheca acutiplicata and other 

 fossils. 



Coarse thick-bedded sandstone. Common Oris- 

 kany fossils plenty. Upper Oriskany. 



Thin-bedded siliceous limestone. Dalmanites 

 stemmatus ?, Craterellina robusta, Actinopteria 

 textilis, Chonetes hudsonica, and many other 

 Oriskany fossils. Lower Oriskany. 



Thick-bedded gray limestones (Keyser, Coey- 

 mans, New Scotland). Gypidula prognostica, 

 Gypidula coeymanensis, Spirifer macropleura. 



Thin-bedded limestone. Fossils few, Leperditia 

 alta f. 



Dove, calcareous, fissile shale, a little limestone. 

 Fossils very scarce. Leperditia alta ?. Blooms- 

 burg red member, shale, red and green, impure 

 limestone and red sandstone — bottom 50 to 

 150 feet. 



Limestone and shale ; fairly f ossilif erous. Kloe- 

 denella abundant. 



Mainly greenish shale weathering purplish. 

 Some sandstone. Thin but workable iron ore 

 beds. Rather f ossilif erous. Anoplotheca hem- 

 ispherica, Beyrichia and many other ostracods. 



