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Brallier shale, these thick beds are thinly laminated and break down into thin chips on weathering. Huntingdon County, Pennsylvania. 1924. Brallier shale, these thick beds are thinly laminated and break down into thin chips on weathering. Cut on Pennsylvania railroad about half a mile east of Huntingdon, looking north. Huntingdon County, Pennsylvania. 1924. Plate 20 in U.S. Geological Survey. Folio 227. 1945. Categories: Image; Tags: Butts, C. Collection, Pennsylvania Folio 227, Photographers, Photographers, Professional Papers, All tags... Railroad, photo print, Fewer tags