^{page 52 note 1} See par. 9.

^{page 52 note 2} See par. 10.

^{page 52 note 3} Q.J.G.S., vol. lxviii, 1912, p. 543.Google Scholar

^{page 52 note 4} Geol. Mao., March, 1878.

^{page 53 note 1} Both Professors Marr and Garwood consider that the area of the Lake District was not a relatively upraised one at the beginning of Carboniferous times. Marr, , Geology of the Lake District, p. 111 Google Scholar; Garwood, , Q.J.G.S., vol. lxviii, 1912, p. 554.Google Scholar

^{page 53 note 2} Second edition, 1912, p. 260.

^{page 53 note 3} e.g. the thickness of the beds beneath the Jew Limestone in Teesdale is 428 ft., at Crook 636 ft., and at Alston 1,537 ft., and in Mid-Northumberland the beds on the same horizon must be at least 4,000 ft.

^{page 54 note 1} The thickness between the Felltop and the Little Limestones in Teesdale is 360 ft., at Crook 114 ft., at Alston 350 ft., in Mid-Northumberland 1,200 ft., and at Broomhill, near Amble, 455 ft.

^{page 54 note 2} Smith, S., “The Carboniferous Limestone Series in the North of England”: N. of Eng. Inst. Min. and Mech. Eng., 1912, p. 181.Google Scholar

^{page 54 note 3} Gunn, W., Geol. Mag., 1918, p. 342 Google Scholar; and Garwood, , “Geology of Northumberland and Durham”: Geology in the Field, Geol. Assoc., 1910, p. 674.Google Scholar

^{page 54 note 4} Lebour, , Trans. N. of Eng. Inst. Min. and Mech. Eng., vol. xxiv, p. 73.Google Scholar

^{page 54 note 5} Simpson, J. B., Trans. Inst. Min. Eng., vol. xxiv, p. 549.Google Scholar

^{page 55 note 1} Zones as given by Professor Garwood, , Q.J.G.S., vol. lxviii, 1912, p. 547.Google Scholar

(1) Zones of North-Western Province:—

D. Dibunophyllum.

C. Productus corrugato-hemispherica.

B. Michelinia grandis.

A. Athyris glabristria.

(2) Equivalent zones of South-Western province. The lowest zones are not represented.

^{page 55 note 2} The zonal equivalents of the Durham Beds are not yet determined, but judging from the results obtained in the Pennine area, the Yoredale Rocks are D₂, the Melmerby Scar Limestone S₂ and D₁. The lowest zone to which the Basement conglomerate goes is not known, but such beds go down to C₁ on the escarpment, and if this is so at Roddymoor, then the 80 feet of rock there must be homotaxial with many hundreds of feet in Northumberland. It will be interesting to see how far the examinations of the fossils collected verifies the correlation in this table.

^{page 55 note 3} I have purposely omitted the exact line of demarcation between the Tuedian and Bernician, as this paper is not the place to discuss the limits of these formations.

^{page 55 note 4} Roman Fell Series of Lebour; see par. 9.

^{page 56 note 1} Lebour, , Geology of Northumberland and Durham, p. 60.Google Scholar

^{page 56 note 2} Q.J.G.S., p. 60.Google Scholar

^{page 56 note 3} Westgarth Forster's Section of the Strata, p. 97.

^{page 58 note 1} Clough is of the opinion that there is evidence of much assimilation in Teesdale, Geol. Mag., 1880, p. 433.Google Scholar

^{page 58 note 2} Egglestone, W. M., “Geology of the Little Whin Sill”: Trans. Inst. Min. Eng., vol. xxxix, pt. i.Google Scholar

^{page 58 note 3} Teall, J. J. H., “On the chemical and microscopical characters of the Whin Sill”: Q.J.G.S., vol. xl, 1884, p. 654.Google Scholar

^{page 58 note 4} See The Face of the Earth, vol. i, p. 154.Google Scholar

^{page 59 note 1} Garwood, , Q.J.G.S., vol. lxviii, 1912, p. 537.Google Scholar

^{page 59 note 2} ProfessorLebour, , Geology of Northumberland and Durham, p. 51, and Geol. Surv. Map, New Series, sheet 31.Google Scholar

^{page 60 note 1} Geology of Northumberland and Durham, p. 536.Google Scholar