Outlines of the geology of England and Wales. With an introductory compendium of the general principles of that science, and comparative views of the structure of foreign countries ... / By the Rev. W.D. Conybeare ... and William Phillips ... Part I.

  • Conybeare, William Daniel, 1787-1857.
Date:
1822
Catalogue details

Licence: Public Domain Mark

Credit: Outlines of the geology of England and Wales. With an introductory compendium of the general principles of that science, and comparative views of the structure of foreign countries ... / By the Rev. W.D. Conybeare ... and William Phillips ... Part I. Source: Wellcome Collection.

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    which the upper stratum of each lower pit is dug into, and forms the floor of the next above it. No. Lower pit. feet. 1. Chalk with beds and nodules of flint 2. Green sand identical with the Reading oyster bed, and in every respect resembling No. 2 at Woolwich * j 3. Ash-coloured sand, slightly micaceous, without pebbles or shells .... 35 This bed, though below the general floor of the mid- dle pit, is sunk into it by deep shafts. Middle pit. 4. Coarse green sand containing pebbles 5 5. Thick bed of ferruginous sand, containing flint pebbles 2^ 6. Loam and sand, in its upper part cream-coloured, and containing nodules of friable marie, in its lower part sandy and iron-shot 4 7. Three thin beds of clay, of which the upperand lower contain cythereas, and the middle oysters 3 Upper pit. 8. Brownish clay containing cythereae. ___ This is the lowest bed sunk into the upper pit, and is not there penetrated to a depth exceeding- one foot. The interval between this and No. 7, which occupies the summit of the middle pit, is not exactly ascertained, but cannot be con- siderable, probably 6 9. Lead-coloured clay containing impressions of leaves 2 10. Yellow sand * g 11. Striped loam and plastic clay, containing a few pyritical casts of shells, and some thin leaves of coaly matter 10 12. Striped sand, yellow, fine and iron-shot 10 13. Alluvium. Total 91 At a point still higher in the hill lies a mass of the London G