| 21. | Southerly flowing rivers from this same landmass were responsible for the Millstone Grit / Marros Group succession in South Wales.
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| 22. | The reserve covers and has a varied geology with Old Red Sandstone below the cliffs and Millstone Grit above them.
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| 23. | Rochdale Town Hall is wide, deep, and is faced with millstone grit quarried from Blackstone Edge and Todmorden.
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| 24. | The Pennine Coal Measures Group is preceded ( underlain ) by the Millstone Grit Group which is of Namurian age.
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| 25. | The areas of Millstone Grit form an'inverted horseshoe'around the lower uncapped limestone areas of the White Peak.
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| 26. | The church was built of millstone grit and the detached spire of the mid-14th century looks to be earlier.
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| 27. | To the east is the valley of the Burbage Brook, which is overlooked by Burbage Edge, a Millstone Grit escarpment.
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| 28. | A millstone shaped from Millstone Grit quarried in the area has been adopted as the emblem of the Peak District National Park.
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| 29. | This is a late-eighteenth century single arched humpback bridge, made of millstone grit, and is grade II listed.
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| 30. | The catchment lies on carboniferous rocks of Millstone Grit, and is heavily reservoired, with 39 reservoirs licensed to provide water.
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