The Ancient Volcanoes of Great Britain, Volume 1 (of 2)Note 107 — Chapter XI · THE CAMBRIAN VOLCANOES OF NORTH WALES, THE MALVERN HILLS AND WARWICKSHIREReading editionOp. cit. vol. xxxv. p. 312.◇Copy noteReturn to CHAPTER XI THE CAMBRIAN VOLCANOES OF NORTH WALES, THE MALVERN HILLS AND WARWICKSHIRE