 | Pennsylvania. Geological Survey - 1877 - 258 Seiten
...Coal 0' 3") Slate 1' 0" > V 6" Coal 0' 3" ) Thin black slates 18' W Coal.BedC? V 9' Fireclay 4' 0" Gray sandstone 13' 0" Wavy sandstone, gray 4' 0' Iron...slates and shales 21' 0" Massive black shales 15' 0" (J ray sandstone 5' 0" Masc ive black slate 5' 0" Coal thin. Black slates 1' 0'' Gray sandstone 4'... | |
 | Geological Survey of Pennsylvania, Pennsylvania. Geological Survey - 1877 - 430 Seiten
...(?) 0 9 Fireclay 4 0 Gray sandstone 18 0 Wavy sandstone, gray 4 0 Iron stained slates 6 0 Coal,bedJ} 3 6 Fireclay 3 0 Gray slates and shales 21 0 Massive...Massive black slate , 5 0 Coal thin. Black slates I 0 Gray sandstone 4 0 Thin gray slates 6 0 f Coal 4' 6" j Coal, bed A ) Slate 0' 6' £ 610 I Coal... | |
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Coal 0' 3" ) Thin black slates 13' O'r Coal.BedC? 0' 9' Fireclay 4' 0" Gray sandstone 13' 0" Wavy sandstone, gray 4' 0' Iron stained slates 6' 0' Coal.BedB 3' 6' Fireclay 3' 0" Gray slates and shales 21' 0" Massive black shales 15' 0" Gray sandstone 5'... 