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| Keywords: The Quarterly journal of the Geological Society of London (13935372352).jpg 266 PROCEEDINGS OF THE GEOLOGICAL SOCIETY Feb 7 <br> Fig 4 Section at Keiss Harbour <br> E w <br> 1 Eeddish -brown stony clay <br> 2 Dark-grey pebbly silt with broken shells <br> 3 Sandstone iceworn <br> At Keiss harbour which hes seven or eight miles further to the north <br> the character of the section is very much the same as at Wick <br> The total thickness of the drift near the harbour is about 40 feet <br> The lowermost 23 feet consist of an unstratified mass of dark sandy- <br> mud with a few broken shells and some stones dispersed through <br> it which reposes directly upon the ice-worn surface of a red sand- <br> stone rock without the intervention of any other deposit The <br> scratches and grooves point W 35° to 40° W and some of the <br> imbedded stones are likewise scratched The upper 17 feet of the <br> bank consists of a browner coarse mud with more stones and so far <br> as I observed no shells Although the lowermost sandy portion of <br> the drift at Keiss and Wick has no distinct stratification it is never- <br> theless more like an ordinary marine deposit than what I saw in the <br> other sections throughout Caithness <br> 3 Character of the Stones imbedded in the Drift The stones <br> imbedded in the Caithness Drift consist for the most part of the debris <br> of the Caithness flags those beds which Murchison terms the middle <br> division of the Old Eed Sandstone of this part of Scotland and <br> accordingly the general hue of the drift closely resembles the pre- <br> vailing dark bluish-grey tint of these strata There is however <br> always a mixture of other sorts ; fragments of quartzose mica- schist <br> and granite occur so far as I observed very frequently in the drift <br> of all parts of Caithness I noticed them at the Burn of Freswick <br> which is only a few miles from Duncansby Head also at Keiss and <br> all about the neighbourhood of Wick and along the whole of the <br> Thurso water There are likewise generally some fragments of <br> sandstone and conglomerate and occasionally one of hornblende- <br> schist ; this latter however is not common Mr Peach also <br> mentions the occurrence of porphyry gneiss Oolite Lias and Chalk- <br> flints Mr Dick told me that fragments of OoHte are not uncommon ; <br> I myself observed many pieces of it in the drift at the mouth of <br> Berriedale <br> I did not see many large erratic blocks but Mr Peach tells me <br> that some big ones of conglomerate are scattered across the country <br> more particularly between Weydale and Stoneguu near Thurso <br> He saw veri/ few on the Scarabin hills Mr Dick told me he had <br> not observed any large blocks which might not have been derived 36164695 111477 51125 Page 266 Text v 22 http //www biodiversitylibrary org/page/36164695 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 36164695 dc identifier http //biodiversitylibrary org/page/36164695 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 N02/13935372352 2015-08-26 06 57 51 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1866 Photos uploaded from Flickr by FÌ using a script | ||||
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