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Birmingham shale (top). At 25 feet below, Ames limestone.

MLA citation style
Johnson, M. E. “Birmingham Shale (Top). At 25 Feet Below, Ames Limestone.”. no date. 1616, 1925June .
APA citation style
Johnson, M. E. (1925). Birmingham shale (top). At 25 feet below, Ames limestone. 1616. Retrieved from https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3Aspgsl-photo_1235
Chicago citation style
Johnson, Meredith E. “Birmingham Shale (Top). At 25 Feet Below, Ames Limestone.”. 1616, Pennsylvania Geological Survey - Historical Photographs, June 4, 1925. https://digitalarchives.powerlibrary.org/papd/islandora/object/papd%3Aspgsl-photo_1235.
Note: These citations are programmatically generated and may be incomplete.