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A Broken Piece of Sandstone

A Broken Piece of Sandstone

This is a piece of sandstone. The stone appears to have been weathered by frost action, or frost wedging. The water flowed into small fissures, and expanded when it froze, which expanded the cracks in the rock.
Galleries: Allegheny Portage Railroad, Rock Specimens
Keywords: allegheny portage railroad, frost wedging, gallitzin, pennsylvania, sandstone, skew arch bridge
Photo Location: Skew Arch Bridge, Allegheny Portage Railroad National Historic Site, Pennsylvania
Photographer: Dr. Roy Winkelman
Date of Photo: 11/25/2011
Device Make: Canon
Device Model: Canon EOS 5D Mark II
Original Dimensions: 5616×3744
Picture Orientation: Landscape
GPS Coordinates: 40°27'11.00"N 78°32'34.23"W
Picture Number: 15924