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Ilkley Moor is part of Rombalds Moor, the moorland between Ilkley and Keighley in West Yorkshire, England. The moor, which rises to 402 m (1,319 ft) above sea level, is well known as the inspiration for the Yorkshire “county anthem” On Ilkla Moor Baht ‘at (dialect for ‘on Ilkley Moor without a hat’).
During the Carboniferous period (325 million years ago), Ilkley Moor was part of a sea-level swampy area fed by meandering river channels coming from the north. The layers in the eroded bank faces of stream gullies in the area represent sea levels with various tides depositing different sorts of sediment. Over a long period of time, the sediments were cemented and compacted into hard rock layers. Geological forces lifted and tilted the strata a little towards the southeast, producing many small fractures, or faults. Since the end of the Carboniferous period more than a thousand meters of the coal-bearing rocks have been completely removed from the area by erosion. During the last million years, Ice Age glaciers modified the shape of the Wharfe valley, deepening it, smoothing it, and leaving behind glacial debris. The millstone grit not only gives character to the town of Ilkley but gives the area its acid soils, heather moors, soft water, and rocky scars. Wikipedia
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An image from Ilkley Moor Yorkshire
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James' World 2 
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