Note 4 — Chapter XXII · PERMIAN OR MAGNESIAN LIMESTONE GROUP.
Reading edition
Ramsay, Quart. Geol. Journ., 1855; and Lyell, Principles of Geology, vol. i, p. 223, 10th edit.
Reading edition
Ramsay, Quart. Geol. Journ., 1855; and Lyell, Principles of Geology, vol. i, p. 223, 10th edit.