Note 262 — Chapter XIII · THE ERUPTIONS OF LLANDEILO AND BALA AGE (continued 2)
Reading edition
Messrs. Harker and Marr, Quart. Journ. Geol. Soc. vol. xlvii. (1891), p. 310.
Reading edition
Messrs. Harker and Marr, Quart. Journ. Geol. Soc. vol. xlvii. (1891), p. 310.