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| Keywords: The Quarterly journal of the Geological Society of London (12471285243).jpg 1865 <br> WALLACE PLOS FEEBI <br> 419 <br> to a considerable amount of decomposition ; for a great portion of <br> them had a corroded appearance It seemed however that before <br> the decomposition commenced the points of the stalactites had been <br> violently broken off Some of the corroded lime was thinly covered <br> with a fine clay ; and upon nearly the whole of it beautiful crystals <br> of arragonite were forming and in some places the clay was incor- <br> porated half an inch or so below the crystals I may observe that <br> no stalagmites were formed on the bottom of the cavern to correspond <br> with these stalactites ; or if they had once been there they must have <br> been entirely dissolved without leaving any trace of their existence <br> Fig 2 ” SJcetch of a horizontal stem of Arragonite in the Dufton <br> Fell Mine <br> It is scarcely necessary to point out the impossibility of stalactites <br> being formed in a cavern filled with water The arragonite must <br> therefore have grown in some kind of air or gas The fact of its <br> crystals covering a stalactite in the course of formation with a cor- <br> responding stalagmite on the floor of the cavern sets this point en <br> tirely at rest Indeed a glance into the cavern would have been <br> sufficient to convince a reasonable mind that the arragordte was <br> formed after the water was drained from the large joint <br> Fig 3 ” BJcetch of a bent stem of Arragonite in the Dufton Fell Mine <br> But if the arragonite could not have been formed in water as in <br> the Silver Band cavern so also in this cavern it was impossible for 34892093 108495 51125 Page 419 Text v 21 http //www biodiversitylibrary org/page/34892093 1865 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 21 1865 Geology Periodicals Smithsonian Libraries bhl page 34892093 dc identifier http //biodiversitylibrary org/page/34892093 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-12 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12471285243 2015-08-27 09 51 36 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1865 Photos uploaded from Flickr by Fæ using a script | ||||
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