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| Keywords: The Quarterly journal of the Geological Society of London (13935468661).jpg 324 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY <br> Mar <br> against the Lower Silurian rocks ; but having seen those near Tagoat <br> to be certainly in the Lower Silurian formation I doubted the cor- <br> rectness of the supposition adopted at Bunmahon and a recent <br> reexamination of the county by Mr Du Noyer has shown these also <br> to be really Lower Silurian red sandstones and conglomerates See <br> Explanation of sheets 167 c of Irish Maps <br> 2 Hooh Head ” The Upper Palaeozoic rocks which strike into the <br> sea south of Duncormick reappear on the coast in the promontory <br> of Hook Head partly in consequence of a change in the strike of the <br> beds which there dip nearly due south and partly from the land pro- <br> jecting farther to the south as we proceed westwards Fig 2 wiU <br> give an idea of the lie and position of the Carboniferous Limestone <br> and undoubted Old Eed Sandstone here ; the latter reposing on <br> slates and grits which belong to the Lower Silurian grou 3 as is <br> evidenced by their fossil contents at Duncannon Eort and else- <br> where These Lower Silurian beds are greatly contorted as is <br> shown in the cliffs of Waterford Harbour for several miles <br> The Old Eed Sandstone rests on the edges of these contorted beds <br> quite unconformably as is shown in section fig 2 and dips from <br> Pig 2 ” Section of part of HooTc Head <br> ž T d Grey often flasrffy limestone <br> d Carboniferous hmestone i_ Black shale highly fossiliferous <br> c Old Red Sandstone <br> b Lower Silurian <br> f Eed and yellow sandstones and shales above <br> \ Eed sandstones and conglomerates below <br> f Indurated shales slates and fine-grained grey <br> 1 grits <br> them to the south as a whole but is itself undulated at slight angles <br> and broken by faults probably of small throws It is well shown in <br> cliffs about 40 feet high for about a mile and a quarter along the <br> shore of Waterford Harbour and for nearly two miles along the <br> eastern shore of the promontory which does not cut so directly across <br> the strike of the beds as the western shore does <br> The thickness of the Old Eed Sandstone here is not exactly <br> determinable owing to its disturbed Ke but it must be at least <br> six or seven hundred feet The lower beds consist of red sandstones <br> and red shales with beds of red conglomerate occasionally Higher <br> up the conglomerates become more massive and beds of white con- <br> glomerate occasionally appear among the red About the middle of <br> See the list of Fossils and the Palseontological Notes by Mr W H Baily <br> in tlie Explanation of sJieets 169 c of the Irish Maps in the Memoirs of the <br> Geological Survey 36164765 111477 51125 Page 324 Text v 22 http //www biodiversitylibrary org/page/36164765 1866 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 22 1866 Geology Periodicals Smithsonian Libraries bhl page 36164765 dc identifier http //biodiversitylibrary org/page/36164765 smithsonian libraries Information field Flickr posted date ISOdate 2014-04-21 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13935468661 2015-08-26 06 53 51 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1866 Photos uploaded from Flickr by Fæ using a script | ||||
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