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• n  a hard coarse-grained siliceous sandstone

• grit
• gritrock

News & Articles

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• Video: Video: First Ascent of Baron Greenback (5.13d) in UK
  Pete Whittaker's first ascent of Baron Greenback (5.13d) in the UK has proved to be one of the hardest gritstone routes of the region.
  Nov. 9, 2013 - Climbing Magazine