56 II. -I. Verwiebe — Berea Formation. 



Section L, Oil City, Pa. 



Thick- 

 ness Total 

 No. Feet Feet 



4. Shenango shale. Bluish-gray, argillaceous shale, 



interbedded with thin shaly sandstones 12 216 



3. Shenango sandstone. Massive layers up to 5 feet 

 in thickness, fairly coarse grain, whitish 

 quartz sand weathering buff. About 9 feet 

 from the bottom occur abundant micaceous 

 layers. Many layers throughout the mass also 

 show bands of white, opaque quartz pebbles. 

 Iron is present in considerable proportion. It 

 occurs largely as botryoidal filling of hema- 

 tite in geodes, some is concretionary and some 

 appears in thin bands 33 204 



2. Meadoille, Shcnpsville and Orangeville. This in- 

 terval is largely covered, except the lower 50 

 feet or thereabouts, which consists of rather 

 sandy shales, drab in color and micaceous, in- 

 terbedded with thin sandstones 155 171 



1. Cony. Sandstone, medium-grained, compact, 

 hard, buff in color ; the layers are massive, 

 some reaching a thickness of 3 feet ; however 

 they show great irregularity in this respect, 

 the same layer often showing marked differ- 

 ence when traced horizontally. Also a more 

 or less conchoidal mode of breaking up is 

 much in evidence. Some shale occurs toward 

 the top.. 16 16 



This section was secured at Oil City, Pa. It begins in the 

 old quarry of the Oil Well Supply Co. and follows down the 

 adjacent ravine to the Pennsylvania Railroad tracks. Some 

 excellent exposures of the Corry occur along the tracks and it 

 may be easily traced to the north in the numerous rock cuts of 

 the railroad. 



Section I, Miller Farm, Pa. 



Thick- 

 ness Total 

 No. Feet Feet 



10. Meadville and Sharpsville. Sandstone, flaggy, 

 bluish-gray and brownish due to weathering; 



some sandy shale is interbedded 45 205£ 



9. Orangeville. Shale, soft, argillaceous, drab and 

 blue ; thin sandy layers occur at intervals ; 

 the surface of the whole is much stained by 

 incrustations of iron compounds. Fossils may 

 be found at various horizons and in consider- 

 able abundance 50 1604, 



