ABSTRACT
We have seen that strata are frequently inclined (or dipping). On examining the strata over a wider area it is found that the inclination is not constant and, as a rule, the inclined strata are part of a much greater structure. For example, the Chalk of the South Downs dips generally southwards towards the Channel – as can be determined by examination of the 1:50,000 Geological Survey map of Brighton & Worthing (Sheet No. 318/333). We know, however, that in the North Downs the Chalk dips to the north (passing beneath the London Basin); the inclined strata of the South and North Downs are really parts of a great structure that arched up the rocks including the Chalk over the Wealden area (as illustrated in Fig. 6.4). Block diagram of a symmetrical anticline (an upright fold). https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780203783795/dfde4bb4-fdec-469e-b9c5-45b632a83daf/content/fig6_4.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
