Industry
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John Franklin Carll was a pioneer petroleum geologist and engineer who originated many standard oil industry practices, including accurate drilling records, correlating and mapping subsurface reservoir rocks, and explaining the increased productivity resulting from reservoir flooding. In the 2nd Geological Survey of Pennsylvania (1875), he provided basic explanations of northwestern Pennsylvania surface and subsurface geology. He lived and worked here from 1864 until his death.
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Pleasantville, Pennsylvania · United States
