Note 372 — Chapter XXI · VOLCANOES OF THE LOWER OLD RED SANDSTONE OF THE CHEVIOT HILLS, LORNE, "LAKE ORCADIE" AND KILLARNEY

The Geology of the Cheviot Hills is comprised in Sheets 108 N.E., 109 N.W., and 110 S.W. of the Geological Survey of England and Wales, and in Sheets 17, 18 and 26 of the Geological Survey of Scotland. For descriptive accounts the Memoirs to some of these Sheets may be consulted, particularly "Geology of the Cheviot Hills" (English side), by C. T. Clough (Mem. Geol. Surv. 1888); "Geology of Otterburn and Elsdon," by H. Miller and C. T. Clough (Mem. Geol. Surv. 1887); "Geology of Part of Northumberland between Wooler and Coldstream," by W. Gunn and C. T. Clough, with Petrographical Notes by W. W. Watts (Mem. Geol. Surv. 1895). Other descriptions have been published by Professor James Geikie, Good Words, vol. xvii. (1876), reprinted in Fragments of Earth-lore (1893), and by Prof. Lebour, Outlines of the Geology of Northumberland, 2nd edit. 1886. For the petrography of the rocks consult Mr. J. J. H. Teall, Geol. Mag. 1883, pp. 100, 145, 252, 344; 1884, p. 226; 1885, p. 106; Proc. Geol. Assoc. ix. (1886) p. 575; and his British Petrography, 1888; Dr. J. Petersen, Mikroskopische und chemische Untersuchungen am Enstatit-porphyrit aus den Cheviot Hills, Inaugural Dissertation, Kiel, 1884.