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Published online by Cambridge University Press: 01 May 2009
Having been lately at St. Davids, I made some observations in relation to the Porth-lisky granite or Dimetian of Dr. Hicks, which may be worth recording in the pages of the Geological Magazine.
Perhaps it may be well for me to state that previous to my examination I had no bias whatever in favour of any of the explanations of the geology of St. Davids which have been offered by Hicks, Geikie, or Blake.
page 558 note 1 Pre-Cambrian Rocks of Pembrokeshire, Q.J.G.S. vol. xl. p. 560.Google Scholar
page 559 note 1 Q.J.G.S. vol. xl. p. 532.Google Scholar
page 559 note 2 The rock is very like the grauwaekes of Wigtonshire. Hicks calls it greenish sandstone, Geikie green shale; it is of an intermediate constitution, but I adopt the term shale.
page 560 note 1 I use the term “vein” because it best describes the form in which these remnants of the shale occur.
