Note 235 — Chapter XIII · THE ERUPTIONS OF LLANDEILO AND BALA AGE
Reading edition
Sheet 101 S. E. of the Geological Survey of England and Wales and Explanation illustrating the same; and papers by him in Quart. Journ. Geol. Soc. vols. xxxi. xxxii. (1875-76). See also Messrs. Aveline and Hughes, Mem. Geol. Survey, Sheet 98 N.E. (Kendal, Sedbergh, etc.).