MAKE A MEME View Large Image The Quarterly journal of the Geological Society of London (12645631754).jpg 1848 MURCHISON ON THE STRUCTURE OF THE ALPS 207 <br> tion of the chalk of North Europe and of the scagha of North Italy <br> is of very considerable thickness ...
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Keywords: The Quarterly journal of the Geological Society of London (12645631754).jpg 1848 MURCHISON ON THE STRUCTURE OF THE ALPS 207 <br> tion of the chalk of North Europe and of the scagha of North Italy <br> is of very considerable thickness certainly several hundred feet <br> The largest superficies in which the inoceramus limestone is ex- <br> posed is around the dome-shaped masses the external faces of which <br> dip rapidly dowT i into the great ravines north-east and east of Burg- <br> berg In the latter we perceived it to be overspread by a thin course <br> of dark greyish fatty marl in which we detected one inoceramus <br> This band is immediately surmounted by marly and incoherent <br> slightly micaceous thin-bedded sandy shale which here has been <br> largely denuded and above Burgberg is exposed in a transverse de- <br> pression between the Griinten mountain on the one hand and the <br> lower nummulitic ridges on the other <br> This hollow space the Yust between the external face of every <br> stratum to which the terms chalk' or cretaceous' can rigorously <br> be applied and the lowest band of nummulitic limestone is occupied <br> in its lower portion by the small micaceous shale and schist before <br> mentioned which is succeeded by a greenish sandstone associated <br> with impure greyish limestone and dark grey shale These beds <br> particularly the sandy impure limestone contain the same Gryphcea <br> vesicularis which has been remarked as lying between the inoceramus <br> limestone and the nummulitic rocks of the Fahnern in Appenzell <br> Here however this intermediate band of green sandstone schist <br> and limestone e of the diagram is vastly more expanded If the <br> section be made in the regular ascending order of the mountain <br> fig 17 as followed from its main escarpment over its summits <br> down the Gundalpe and across the Vust to the nummulitic ridges <br> east of Burgberg this intermediate group e is seen to be perfectly <br> conformable to the inoceramus limestone beneath it and to the lowest <br> nummulitic rock above it Equally is it conformable if another <br> section at right angles to the above be made from the Griinten to <br> the valley of the Starzlach a little to the south of the chief mines <br> and where a rivulet descends from the mountain see fig 18 In <br> Fig 18 <br> The Griinten <br> Cretaceous Nummulites Flysch <br> Starzlach <br> -;p S E <br> V <br> N <br> babcdefff g <br> this section the beds are more nearly vertical and necessarily occupy <br> very small horizontal spaces The same order being followed from <br> centre to flank i e from the neocomian through the greensand <br> and cretaceous strata the explorer does not fail to observe a great <br> thickness of bluish grey slightly micaceous marls and marlstone <br> associated with a sort of greensand and beds of impure grey lime- <br> stone with white veins e in which we again detected the same Gry- <br> pheea as in similar strata in a like position in the other section near <br> Burgberg p 205 <br> ci2 35268851 109512 51125 Page 207 Text v 5 http //www biodiversitylibrary org/page/35268851 1849 Geological Society of London NameFound Nummulites NameConfirmed Nummulites EOLID 6817785 NameBankID 3399048 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 5 1849 Geology Periodicals Smithsonian Libraries bhl page 35268851 dc identifier http //biodiversitylibrary org/page/35268851 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-20 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12645631754 2015-08-27 10 52 11 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1849 Photos uploaded from Flickr by Fæ using a script
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