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| Keywords: The Quarterly journal of the Geological Society of London (12981164363).jpg 394 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY <br> Dec 1 <br> o <br> 00 <br> CM <br> 03 <br> o <br> I <br> O <br> 2Q <br> Cb <br> C55 <br> 1 to <br> o2 <br> §1 <br> M <br> ' <br> f <br> O <br> 5 <br> «3H « <br> Caithness are not the lower members of the <br> Old Eed Series as previously stated in geo- <br> logical works <br> The Old Red Sandstone in the extended <br> sense of the term is not what some geolo- <br> gists who have never examined the IN'orth- <br> east of Scotland and the Orkney Islands have <br> considered it a small and unimportant for- <br> mation the upper part of which might be <br> classed with the Carboniferous deposits and <br> the rest as of no greater importance as to the <br> time occupied in its formation than a mere <br> fragment of the Devonian group only On <br> the contrary the Old E-ed group of this <br> northern region is a grand and expanded <br> series of very diversified mineral character <br> which both from dimensions and organic re- <br> mains must be considered a full and adequate <br> equivalent of all the Devonian rocks of South <br> Britain Germany Eussia Prance Spain and <br> Tiu'key The group as seen in Caithness and <br> the Orkney Islands is composed of three <br> parts � <br> 1 Lower red conglomerate and sandstones <br> 2 Grey and dark- coloured flagstones and <br> schists in parts both bituminous and <br> calcareous <br> 3 Upper red and yellow sandstones <br> The annexed general section fig 9 ex- <br> hibits this order <br> Lower Old Red � The lower red conglome- <br> rate and sandstone a h c form the external <br> and unconformable eastern frmge of all the <br> stratified crystalline rocks which have been <br> described Whether the latter consist of <br> quartzose gneiss at Strathy Head on the north <br> shore or be followed inland along an irregular <br> boundary by Ben Ghream until they become <br> the thin-bedded quartz-rocks of the Scarabin <br> Hills or consist of granite at the Ord of <br> Caithness or of gneissose micaceous schists as <br> they range from Sutherland into Eoss-shire <br> and there occupy the heights of Wyvis or <br> fold round the lower country of Easter Eoss <br> by Dingwall Brahan Castle and Fairburn <br> Tower until they enter Inverness-shire above <br> Beauley we see everywhere similar rock-rela- <br> tions Throughout all this tortuous line the <br> lowest member of the great group under <br> consideration is compounded out of the con- 36161951 111474 51125 Page 394 Text v 15 http //www biodiversitylibrary org/page/36161951 1859 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 15 1859 Geology Periodicals Smithsonian Libraries bhl page 36161951 dc identifier http //biodiversitylibrary org/page/36161951 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-07 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12981164363 2015-08-26 14 55 45 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1859 Photos uploaded from Flickr by Fæ using a script | ||||
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