Note 242 — Chapter XIII · THE ERUPTIONS OF LLANDEILO AND BALA AGE
Reading edition
Mr. Hutchings, Geol. Mag. 1891, p. 539. This observer describes a quartz-andesite or dacite from near Dunmail Raise.
Reading edition
Mr. Hutchings, Geol. Mag. 1891, p. 539. This observer describes a quartz-andesite or dacite from near Dunmail Raise.