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In page Haltwhistle Burn:
"The rocks underlying this part of Northumberland were laid down during the Carboniferous Period when variations in sea level resulted in successive deposits of limestone, shale, sandstone, and coal, known in the UK as Yoredale Series and in the US as cyclothems. The water of the Haltwhistle Burn has cut through these deposits giving access to building stone, clay and coal, leading to the development of the associated industries of quarrying, lime burning, brick, tile and pipe manufacture, coal mining and coke (fuel) and coal-gas production. Ironstone, found in association with the coal seams was also smelted on the banks of the burn.[1][2]
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