Note 190 — Chapter XIII · THE ERUPTIONS OF LLANDEILO AND BALA AGE
Reading edition
Trans. Geol. Soc., 2nd ser. vol. ii. (1823), p. 6 et seq.
[191] Silurian System, p. 401 et seq.
Reading edition
Trans. Geol. Soc., 2nd ser. vol. ii. (1823), p. 6 et seq.
[191] Silurian System, p. 401 et seq.