The Quarterly journal of the Geological Society of London . e has taken for an unconformityis probably, as suggested by Prof. Hughes, only an appearance dueto rock-structure, not uncommon in beds of unequal texture and 1 On some Effects of Pressure on the Devonian Sedimentary Rocks ofNorth Devon, Geol. Mag. 1888, p. 218. 2 Proc. Geol. Assoc, vol. xiii. (1893) pp. 92-93 & p. 170. 3 Mem. Geol. Surv. Ireland, Expl. Sheets 22,.23, 30, & 31 ( Donegal),1891, pp. 13-42. [See also Mr. McHenry on the Portraine and Balbrigganareas in the discussion to this paper, p. 598.] 4 Is it not possible that t


The Quarterly journal of the Geological Society of London . e has taken for an unconformityis probably, as suggested by Prof. Hughes, only an appearance dueto rock-structure, not uncommon in beds of unequal texture and 1 On some Effects of Pressure on the Devonian Sedimentary Rocks ofNorth Devon, Geol. Mag. 1888, p. 218. 2 Proc. Geol. Assoc, vol. xiii. (1893) pp. 92-93 & p. 170. 3 Mem. Geol. Surv. Ireland, Expl. Sheets 22,.23, 30, & 31 ( Donegal),1891, pp. 13-42. [See also Mr. McHenry on the Portraine and Balbrigganareas in the discussion to this paper, p. 598.] 4 Is it not possible that the time-element may in this respect be a factor ofprime importance, and that where the crushing has gone on very slowly therehas been a concurrent dissipation of the generated heat ? 5 Quart. Journ. Geol. Soc. vol. xxxiv. (1878) p. 143. G Ibid. p. 150. Sketch-map of the ISLE OF MAN, to illustrate paper on the Crush-Conglomerates, by G. IV. English Miles. IRISH SEA Gob ny CreggaiiAGlassey A Gob y Deigan* V Contrary Head1. Calf of Man Quart Journ Geol. Soc. Vol. LI. PL XIX. Point of Ayre


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