. Proceedings - Dorset Natural History and Archaeological Society. thetop of Ridgway Hill forms a very noticeable feature in the land-scape. The materials composing this survival of the Eocene bedshave been extensively quarried for economic purposes, and thesteep yellow coloured sides of the gravel pits form a strongcontrast to the more undulating surface of the surrounding chalk.The railway crosses Ridgway Hill by means of two tunnels with acutting between them, the short tunnel to the south and nearerWeymouth, passing chiefly through Purbeck beds, whilst thepiincipal tunnel, nearer Dorcheste
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