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List of collieries in Astley and Tyldesley : ウィキペディア英語版 | List of collieries in Astley and Tyldesley
Astley and Tyldesley are situated on the Manchester Coalfield, historically in Lancashire, now in Greater Manchester, England. ==Geology== The underlying geology of Astley and Tyldesley comprises the sandstones, shales and coal seams of the Middle Coal Measures laid down during the Carboniferous period more than 300 million years ago and which outcrop from Shakerley to New Manchester where coal was mined from seams between the Worsley Four Foot and Arley mines. The seams generally dip towards the south and west and are affected by small faults. The Upper Coal Measures are not worked in this part of the coalfield. To the south of Astley the Coal Measures dip beneath the Permo-Triassic New Red Sandstone.
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