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| Keywords: The Quarterly journal of the Geological Society of London (12683734204).jpg 1856 <br> CHARTERS CLEAVAGE AT MONT LACHA <br> 385 <br> 2 Scrutineers were appointed who after the Ballot reported <br> that Col Portlock K E F R S was unanimously elected Presi- <br> dent; and tbat Hugh Falconer M D F R S was unanimously <br> elected a Member of Council <br> ORDINARY MEETING <br> Col Portlock President in the Chair <br> The following communications were read ” <br> \ On a Section near Mont Blanc <br> By Major S Charters F G S <br> In a letter to Dr Fitton F G S <br> On looking over an old note-book I found a Section which satisfies <br> me that Mr D Sharpe is correct in the view he has taken of the <br> cleavage I send you a copy of it which if you have an oppor- <br> tunity you may show him ” not that the observations of so unscien- <br> tific a geologist as I am can have any weight but it may be satisfac- <br> tory to him now that his paper has been attacked to see that the <br> difference between cleavage and stratification as exhibited at Mont <br> Lacha attracted the attention of such a mere dilettante as myself <br> now five years ago ” and that I scouted the idea of strata plunging <br> under the igneous rock that had upheaved them ; and that until I <br> had made out the cleavage of Mont Lacha I had attributed the <br> anomaly to reversal <br> M Blanc <br> « <br> JTh <br> cS <br> s <br> ¢c <br> o <br> ¢SjvOJ <br> d <br> u B <br> <br> S E a« <br> 3 <br> Cm <br> O D <br> – <br> o <br> So <br> Eh <br> N W <br> Crystalline schist <br> Anthraciferous schist <br> Crystalline schist <br> The dotted lines represent the lines of cleavage perpendicular to those of stratification <br> which dip to the north-west at an angle of 75° <br> Ascending the torrent of La Gria which nearly marks the sepa- <br> ration of the calcareous rocks of Mont Lacha from the crystalline <br> rocks of the Aiguille de Goute we find a dark-coloured compact <br> limestone the strata of which dip at an angle of 7 ° to N W Pro- <br> ceeding further up the ravine the calcareous rock becomes more <br> schistose and frequently talcose Belemnites and Ammonites in 35338842 109655 51125 Page 385 Text v 12 http //www biodiversitylibrary org/page/35338842 1856 Geological Society of London NameFound Belemnites NameConfirmed Belemnites EOLID 4780330 NameBankID 4089090 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 12 1856 Geology Periodicals Smithsonian Libraries bhl page 35338842 dc identifier http //biodiversitylibrary org/page/35338842 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-21 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12683734204 2015-08-27 11 59 05 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1856 Photos uploaded from Flickr by Fæ using a script | ||||
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