|7.||Blue and brown clay—striped and full of shells, chiefly cerithia and cythereæ||9|
|8.||Clay striped with brown and red, and containing a few shells of the above species||6|
|9.||Rolled flints mixed with a little sand, occasionally containing shells like those near Bromley; e. g. ostrea, cerithium and cytherea. (These shells occur disseminated in irregular patches)||12|
No. 1 and 2 are not laid open in the great sand pits, but are seen in a chalk pit adjoining to the eastern extremity of the sand pit. The following section at Loam Pit Hill, near Lewisham, about three miles south-west of Woolwich, presents analogies that identify many strata in the two sections, as from the chalk upwards to No. 8; in each inclusively the principal difference consists in the presence of fewer or more pebbles, in beds of sand evidently contemporaneous.
(See coloured Section, P1. 13, No. 2 )
|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||1|
- These beds cannot all be observed at one section, but may be traced along the sloping surface of the hill, at three successive apertures near each other, in which the upper stratum of each lower pit is dug into, and forms the floor of the one next above it.
In the section No. 2, the intermediate spaces are unnaturally contracted, and expressed by two narrow caps of alluvium.