Notes on some Coast-sections at the Lizard

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Abstract
I. Introduction The well-known serpentine of the Lizard may be seen in contact with hornblende-schist, and also with the rocks for which Prof. Bonney proposed the term ‘Granulitic Series.’ The object of the present communication is to describe two small portions of the western coast, where phenomena which throw important light on the nature of the relations of the serpentine to the adjacent rocks may be observed. The first is in the neighbourhood of Ogo Dour, and the second east of the Lion Rock, Kynance. II. Relation Of Serpentine To Hornblende-schist At Pol Cornick In his classic ‘Report on the Geology of Devon, Cornwall, and West Somerset,’ De la Beche says (p. 30) :—" It [the hornblendesate] supports the great mass of the Lizard serpentine, with an apparent passage of the one into the other in many places . . . . . In contradiction to this apparent passage, we find a mass of serpentine amid the hornblende-slate between Dranna Point and Porthalla, on the north of the principal mass of serpentine, which has every appearance of having been thrust up among the hornblende-slate, twisting and contorting the laminæ adjoining it in directions which we should consider consistent with the passage of the serpentine in a state of igneous fusion through them." In these sentences De la Beche shows that he had observed facts which apparently contradicted each other, and with characteristic candour he states the two more or less opposed views, leaving the question undetermined. In 1877 and 1883

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