outside Yorkshire– it was obtained from an open cast pit in Northumbria, but is from the same formation as Yorkshire coal. Preserving the samples Some samples, such as the Millstone Grit, are very - The Grit - Document - PDFSEARCH.IO

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	outside Yorkshire– it was obtained from an open cast pit in Northumbria, but is from the same formation as Yorkshire coal. Preserving the samples Some samples, such as the Millstone Grit, are very Add to Reading List Open Document File Size: 539,40 KB Share Result on Facebook

outside Yorkshire– it was obtained from an open cast pit in Northumbria, but is from the same formation as Yorkshire coal. Preserving the samples Some samples, such as the Millstone Grit, are veryAdd to Reading List