The Ancient Volcanoes of Great Britain, Volume 1 (of 2)Note 192 — Chapter XIII · THE ERUPTIONS OF LLANDEILO AND BALA AGEReading editionMem. Geol. Survey, vol. i. p. 231.◇[193] Silurian System, p. 404.◇Copy noteReturn to CHAPTER XIII THE ERUPTIONS OF LLANDEILO AND BALA AGEReturn to CHAPTER XIII THE ERUPTIONS OF LLANDEILO AND BALA AGE