Note 296 — Chapter XV · THE DEVONIAN VOLCANOES
Reading edition
"Report on the Geology of Cornwall, Devon and West Somerset," Mem. Geol. Survey, 1839, p. 37.
[297] Op. cit. p. 57.
[298] Op. cit. pp. 57, 61.
Reading edition
"Report on the Geology of Cornwall, Devon and West Somerset," Mem. Geol. Survey, 1839, p. 37.
[297] Op. cit. p. 57.
[298] Op. cit. pp. 57, 61.