The rocks have been greatly changed by pressure in most cases and by the intrusion of great masses of igneous material, the Namaqualand schists and Malmesbury beds being most altered.
They rest indifferently on the Ibiquas series or Malmesbury beds.
Of the other towns Somerset West (2613), Somerset West Strand (3059), Stellenbosch (4969), Paarl (11,293), Wellington (4881), Ceres (2410), Malmesbury (3811), Caledon (3508), Worcester (7885), Robertson (3244) and Swellendam (2406) are named in the order of proximity to Cape Town, from which Swellendam is distant 134 m.
The chief wine-producing districts are those of the Paarl, Worcester, Robertson, Malmesbury, Stellenbosch and the Cape, all in the south-western regions.
Thus William of Malmesbury says that he was sent to Britain by St Philip, and, having received a small island in Somersetshire, there constructed "with twisted twigs" the first Christian church in Britain - afterwards to become the Abbey of Glastonbury.