The Ancient Volcanoes of Great Britain, Volume 2 (of 2)Note 309 — Chapter XLII · THE BASIC SILLS OF THE BASALT-PLATEAUXReading editionQuart. Jour. Geol. Soc. xxvii. (1871), p. 296.◇Copy noteReturn to CHAPTER XLII THE BASIC SILLS OF THE BASALT-PLATEAUX