Petroleum ands Gas

The Oil and Gas field is in the Townships of Monroe, Pleasant and Bearfield. The surface of this territory lies in the Lower Productive and Lower Bar- ren Coal Measures. As has been stated in previous topics, the Ames Limestone has its horison on the tops of the hills. The Sundaycreek valley, which is the deepest in the neighborhood, cuts its way through the Great Coal Vein north of Corning. Corning, itself, is at the level of the Upper Freeport Coal. The oil is found in the Berea sand, which has been found to have an average thickness of about 30 feet. 30

Through the courtesy of Mr. Geo. DeLong, the fol- lowing "log" of a well drilled on his lot in Corning is given. The top of the well lies at the base of the Mahoning Sandstone. The elevation is practically the same as given for the Corning Depot. (See ele- vations). Thickness Total of Stratum Thickness. Feet. Feet. Shale........................................... 25 25 Bastard Lime ............................. 15 40 Sand ........................................... 10 50 Coal (No. 6)................................ 10 60 White Slate ............................... 65 125 Sand............................................ 15 140 White Slate ................................ 25 165 Blue............................................. 10 175 Sand............................................ 10 185 Slate ........................................... 50 235 Shale........................................... 35 270 Sand .......................................... 30 300 Black Shale ............................... 10 310 Lime ........................................... 25 335 Shale with Concretions ........ 100 435 Slate .......................................... 25 460 Limestone (?) .......................... 30 490 Shale.......................................... 35 525 Salt Sand .................................. 30 555 White Slate ............................... 100 655 Slate and Concretions ........... 25 680 Shale.......................................... 15 695 Little salt sand ......................... 20 715 White slate.............................. 100 815 Slate and Concretions ........... 100 915 Brown Shale ........................... 40 955 Black Shale ............................. 38 993 Top Berea ....................... 993 Bottom of Berea .................. 1,008 31

The Berea sand is of a light gray color, fine grained, and usually a pure quartz. The "pay streak" or the part containing the oil and gas ranges in thick- ness from 3 to 8 feet. The wells are cased through the salt sand at a depth of about 555 feet. The amount of salt water found in the Corning field, especially in the eastern part, is wonderful. It seems to have some effect on the gas pressure. The western part of the field, in the vicinity of Oakfield, is practically free from salt water. Here is where the strongest gas producing wells are. Near Junction City has been bored the deepest well in the county. It reached the Clinton Limestone at a depth of 3090 feet. It is in the Clinton rock that gas is found in the Sugar Grove field. The fol- lowing is the approximate depth and thickness of the various strata. Feet. To the Berea sand ................................... 826 Thickness of the Berea, to the shale. ........ 40 Thickness of shale to the Niagara........... 1,154 Thickness of Niagara to Shale. ................. 930 Thickness of shale to Clinton..................... 140 The Clinton is about 30 feet thick. A small amount of oil was found in this rock. 32

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