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This Rock is Being Weathered in Two Ways

This Rock is Being Weathered in Two Ways

This large, gray rock is experienceing both chemical weathering, and mechanical weather. Small rocks have spalled off from the parent rock, proably due to freeze-thaw action. Some of the rocks constituent minerals are oxidizing, which creates the reddish-brown staining.
Galleries: Yosemite National Park
Keywords: chemical weathering, mechanical weathering, oxidization, oxidizing rock, rocks
Photo Location: Yosemite National Park, California
Photographer: Dr. Roy Winkelman
Date of Photo: 07/10/2011
Device Make: Canon
Device Model: Canon EOS 5D Mark II
Original Dimensions: 5616×3744
Picture Orientation: Landscape
GPS Coordinates: 37°44'36.00"N 119°34'33.00"W
Picture Number: 12921