I.—On the Structure and Organisms of the Lower Limestone Shales, Carboniferous Limestone and Upper Limestones of the Forest of Dean

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Abstract
Sir Andrew Ramsay has described the Coal-fields of the Forest of Dean, Somersetshire, and Bristol as outliers of the great Coal-fields of South Wales; there is, however, a marked thinning out in the thickness of the Carboniferous rock in the Forest of Dean as compared with the development of those rocks in South Wales and Bristol. At Clifton, near Bristol, the total thickness of the Carboniferous Limestone is about 2900 feet, at the northern end of the Forest of Dean Coal-field it is about 600 feet.

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