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78 



OOLITE LIMESTONES. 



Upper 

 Gallery. 



Wall-case 43. 



The lower part of the Inferior Oolite, in Dorsetshire, is 

 represented by ferruginous beds, containing a large per- 

 centage of iron, in the form of oolitic grains. 



61. — Disintegrated Portland stone, loose oolitic grains 

 of carbonate of lime, from Portland beds, immediately 



underlying Gault 



62. 



ried for roofing tiles. 

 Cheltenham. 



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Iffard. 



7 ilts. Map 15. 

 shell?/ limestone, quar- 

 Three miles east of 



63. — Forest marble, shelly limestone. — Frome, Somerset 



64. — Forest marble, shelly limestone. 



65. — Fuller's earth rock, impure grey shelly lime- 

 stone, formed of oyster shells. — Sapper ton Tunnel, six miles 

 south of Stroud, Gloucestershire. 



66. — Fuller s earth rock, shelly limestone, formed of 

 oysters and other shells. — Three miles east of Cheltenham. 



66 a. — Forest marble, shelly limestone, with numerous 

 oysters. — Westwell, near Burford, Oxon. 



67. — Forest marble, shelly limestone, containing pebbles 

 of clay and fragments of drift wood. — Frome, Somerset. 



(See " Memoirs of Geological Survey," vol. i., p. 285.) 



68. — Forest marble, dark grey shelly limestone, con- 

 taining plant remains. — Dorset. 



The forest marble of Dorsetshire affords in general a cold 

 and wet soil, which is converted for the most part into pas- 

 ture. This is more particularly the case where the clays pre- 

 dominate. The stone is quarried for flags, for building, 

 and for road metal ; but it is not burned for lime, except in 

 the neighbourhood of Bridport (Bothenhampton), probably 

 in consequence of the superiority of the lime afforded by the 



neighbouring Cornbrash and Fuller's Earth limestones. 



H.W.B. 



69. Forest marble, shelly limestone, partly oolitic, 

 and containing Mytilus and numerous Oysters. — Bibury, 

 Gloucestershire. 



(See Hull's " Memoir on Map 44 of the Geological Survey," 

 pp. 65 and 70.) 



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