Keywords: The Quarterly journal of the Geological Society of London (12960150353).jpg 96 <br> PROF T G BONNET S PETROLOGICAL NOTES ON THE <br> places the quartzite series crosses for a short space over to this <br> left bank of the former valley <br> We have thus a very irregular slip of Hebridean gneiss capped in <br> part by some Torridon Sandstone bounded by two or more faults <br> which bring down the quartzite and calcareous series on the one hand <br> and the newer gneiss series on the other figs 2 3 <br> In the section given by Sir E Murchison Q J G S vol xvii <br> p 191 a small patch of syenite is also marked as occurring on <br> the right bank of Loch Maree near its head Of the gneissose <br> character of this I have not any doubt ; but I also found there a <br> rock which both macroscopically and microscopically appears to be <br> a true diorite I saw no signs of intrusion and think the presence <br> of this patch of the older rock may be explained by faulting though <br> I am not prepared at present to say in what manner that is to be <br> connected with the other faults <br> Fig 2 ” Section in Glen Laggan along the line A in fig 1 <br> Fault Fault <br> Fig 3 ” Section in Glen Laggan along the line B in fig 1 <br> Fault <br> 2 Hebridean Gneiss together with the so-called Syenite <br> The macroscopic characters of this rock in the present district <br> have been already described by previous observers so it wiU suffice <br> to make a few remarks on the microscopic structure of the specimens <br> which I collected These were obtained from the above-named <br> localities m Glen Laggan at intervals on the right bank of Loch <br> ad with me a copy of Dr Hicts's section vol xxnv p 814 but entirely <br> tailed to reconcile it with what I saw on the ground 36090431 111264 51125 Page 96 Text 36 http //www biodiversitylibrary org/page/36090431 1880 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 36 1880 Geology Periodicals Smithsonian Libraries bhl page 36090431 dc identifier http //biodiversitylibrary org/page/36090431 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-06 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12960150353 2015-08-26 16 55 04 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1880 Photos uploaded from Flickr by Fæ using a script |