278 The Rev. W. Buckland on the Plastic Clay Formation. 



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.* 



Section of Catsgrove Hill. 



No. Thickness in Feet. 



1. Chalk containing the usual extraneous fossils and 



black flints ----------- unknown 



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 fine 



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 fine 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 



* The measures in this and all the following sections were taken by the eye and do not 

 pretend to extreme accuracy. 



