Page:Transactions of the Geological Society, 1st series, vol. 4.djvu/288

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a mile from the town of Reading, on the south-west, where the works have been carried on for more than a century, and at this time present the following section, beginning from the lowest upwards.[1]


Section of Catrgrove Hill.
No. Thickness in Feet.
1. Chalk containing the usual extraneous fossils and black flints
2. Siliceous sand mixed with granular particles of green earth, and containing both rolled and angular chalk-flints, oysters, and many small and nearly cylindrical teeth of fish from a line to an inch in length 3
3. Quartzose sand of a yellowish colour with a few small green particles, and containing no pebbles or organic remains 5
4. Fullers' earth 3
5. White sand used for bricks 4
6. Lowest brick clay of a light grey colour mixed with line sand, and a little iron-shot 5
7. Dark red clay, mottled with blue and occasionally a little iron-shot. It is used for tiles 6
8. Bed called the White vein. A line ash coloured sand mixed with a small portion of clay, and in some parts passing into loose white sand. It is used for bricks 5
9. Fine micaceous sand laminated and partially mixed with clay, and occasionally iron-shot. It is used to make tiles 4
10. Light ash coloured clay, mixed with very fine sand of the same colour. It is used for bricks 7
  1. The measures in this and all the following sections were taken by the eye and do not pretend to extreme accuracy.