This is a large outcropping of sandstone. There are vertical marks, near the top of the stone. The marks were made by drills that were used by stonecutters, to create straight breaks in the stone.Galleries:Allegheny Portage Railroad, Rock SpecimensKeywords:allegheny portage railroad, drill holes, gallitzin, pennsylvania, sandstone, stone masonry, stonecuttersPhoto Location: Allegheny Portage Railroad National Historic Site, PennsylvaniaPhotographer: Dr. Roy WinkelmanDate of Photo: 11/25/2011Device Make: CanonDevice Model: Canon EOS 5D Mark IIOriginal Dimensions: 5616×3744Picture Orientation: LandscapeGPS Coordinates: 40°27'26.33"N 78°32'57.61"WPicture Number: 15830
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