^{page 561 note 1} Quart. Journ. Geol. Soc. vol. xxxi. p. 319.Google Scholar

^{page 564 note 1} Since the publication of portions of the address in the local papers, Mr. Thomas Collins, of Redruth, has written to say, “he considers there is evidence in the Tavistock district that the metalliferous deposits containing copper-ores had been formed in the Devonian rocks before the deposition of the main mass of the Carboniferous. The large copper-lodes of Mary Tavy, for instance, are in Devonian rocks, and cease altogether on coming into contact with the black schists of the Carboniferous.” It is suggested that this may be due to faulting at the junction.