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| Keywords: The Quarterly journal of the Geological Society of London (12711418015).jpg 172 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY Jan 31 <br> line of foliation In the different beds of limestone I did not observe <br> any mica whatever <br> Case 8 ” On the other side of Christiansand about five miles <br> from the town west of Torresdale River we have very extensive beds <br> of a white crystalline limestone very similar to and foliated like the <br> last-mentioned A section is seen in fig 4 and represents a quarry <br> near the top of a mountain called Pusaasen <br> Fig 4 ” Section of gneiss and limestone at Pusaasen Mountain <br> near Christiansand Norway <br> a Granitic gneiss ; not distinctly foliated <br> b Quartzose brownish foliated gneiss <br> c c White crystalline foliated limestone about 15 feet exposed <br> – r x Indeterminable broken and weathered mass filling joint <br> The section is taken about parallel to the strike or 40°N W --S E <br> The strata incline towards the south and dip at 15° S W At the <br> top of the section on the north side we have a considerable mass of <br> gneiss a without a grain or nearly granite-gneiss with no foliated <br> arrangement apparent very quartzy and containing but very little <br> mica This abuts against a bed of very quartzy gneiss Z where the <br> lines of the foliation give the appearance of its having been doubled <br> up This gneiss contains numerous crystals of iron-pyrites in the <br> lines of foliation and by their oxidation it has acquired a rust-brown <br> colour Between these two gneiss rocks we have a joint filled up <br> with a broken decomposed and weathered mass x of undistin- <br> guishable character ; but below the whole is a large bed of white <br> crystalline limestone foliated by lines of augite-crystals precisely as <br> in the last case ; the foliation is here parallel to the upper and lower <br> surfaces or the foliation of the gneiss above it About 15 feet of <br> the limestone bed is uncovered ; the lower 3 feet is coarser-grained <br> than the upper 12 feet At a few spots mica is seen present foliating <br> the limestone in a similar direction <br> Case 9 ” On the same side of the Torresdale River and about <br> two miles west of the last locality can be seen an extremely interesting 35614744 110213 51125 Page 172 Text v 11 http //www biodiversitylibrary org/page/35614744 1855 Geological Society of London NameFound Indeterminable NameConfirmed Indeterminable NameBankID 1683209 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 11 1855 Geology Periodicals Smithsonian Libraries bhl page 35614744 dc identifier http //biodiversitylibrary org/page/35614744 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-23 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12711418015 2015-08-26 20 59 59 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1855 Photos uploaded from Flickr by Fæ using a script | ||||
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