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| Keywords: The Quarterly journal of the Geological Society of London (14095909473).jpg 530 H HICKS OIT THE PEE-CAMBEIAN <br> Fig 4 Section from the Coast to Bryn-y-yarn <br> S S W <br> N N E <br> Cambrian Dimetian <br> For explanation see fig 3 <br> conglomerates witli rolled fragments of Dimetian up to the size of a <br> hazel-nut or larger Under the series No 4 come the LinguJella- <br> jprimceva heds and good specimens of that fossil have been found <br> here especially in the bright red beds on the east side of the creek <br> The yellowish sandstones and conglomerates at the base i os 2 1 <br> have been already referred to The section fig 4 as taken from the <br> centre of the Dimetian ridge from the well-known point of Bryn-y- <br> garn in a S S W direction to the extreme end of the headland on <br> the west side of Porth-melyn contains such important and conclusive <br> evidence in regard to the questions at issue between the Director- <br> General and myself that I submit it with perfect confidence to the <br> consideration of any one who is interested in them and has an <br> opportunity of visiting St David's The slides described by <br> Mr Davies in Notes 49-60 were prepared from grits and fine con- <br> glomerates found in the series of Cambrian rocks on the west side <br> of Porth-melyn They give abundant proof of what seems perfectly <br> clear even on macroscopical evidence that the material deposited in <br> the very earliest Cambrian period in this area was derived from <br> such rocks as we now claim to be of Pre-Cambrian age Almost <br> every peculiarity recognizable in the underlying Pre-Cambrian <br> rocks is equally visible in the fragments contained in the overlying <br> Cambrian rocks This to my mind is perfectly conclusive proof of <br> the Pre-Cambrian age of the rocks I class under the names <br> Dimetian Arvonian and Pehidian in the St David's area My <br> reply to Dr Gcikie might as stated before have been confined to <br> these facts alone ; but as so many statements have been made which <br> I cannot allow to pass unchallenged I propose to deal with each <br> of the sections at the points referred to by him ; and I shall be <br> able I think to show how utterly impossible it would be even on <br> purely geological evidence for the interpretations given by him of <br> the conditions shown to be the true ones Moreover it is but <br> fair to ourselves to state that our conclusions were mainly arrived <br> at by critical investigations of the general geological facts exhibited <br> by these sections 36941363 113697 51125 Page 530 Text 40 http //www biodiversitylibrary org/page/36941363 1884 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 40 1884 Geology Periodicals Smithsonian Libraries bhl page 36941363 dc identifier http //biodiversitylibrary org/page/36941363 smithsonian libraries Information field Flickr posted date ISOdate 2014-04-30 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/14095909473 2015-08-26 05 51 50 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1884 Photos uploaded from Flickr by FĂŚ using a script | ||||
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