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| Keywords: The Quarterly journal of the Geological Society of London (12981368984).jpg 120 PROCEEDESTGS OF THE GEOLOGICAL SOCIETY JuHG 23 <br> fig 3 is somewhat towards the valley ; but I believed it to be much <br> more so on the north-western top of the steep border of the Yal di <br> Bove on the side of Schiena dell'Asino I observe too that the dip <br> of the beds of the said Schiena was at 16° to 20° towards the N N E <br> and prevailed throughout the whole ridge as far as the Cirrita I <br> saw the conformity of stratification away from the valley with the <br> same dip of the beds of Schiena dell'Asino in the Eocca deUa <br> Capre and Musarra fig 2 ; and all seemed to me according to <br> my theoretical view quite right when I found on the side of <br> Zoccolaro notwithstanding great irregularities a mean inclination <br> of all the beds towards south and south-east According to my <br> view I believe it impossible that the effect of a subsidence of so <br> enormous extent as that corresponding to the circuit of the actual <br> Val di Bove should have taken place without the greatest derange- <br> ment especially in the original structure of the central masses of <br> the mountain fig 4 h c d by a gliding towards the chasm in an <br> altered position between h and a fig 1 <br> The considerable anomaly in the dip of beds away from the valley <br> round or behind the Giannicola I looked upon as a natural conse- <br> quence of the protrusion of that gigantic dyke or rather system of <br> dykes constituting the Solfizio and the Giannicola When descending <br> from the border of the Piano del Lago fig 4 a and studying step <br> by step the stratified masses I was struck by the relation I saw <br> between the beds originally horizontal dipping away from the <br> vaUey and the protrusion of the immense dykes the direction of <br> which as far as my examination could reach was that of N N W - <br> S S E This circumstance strengthened me in the opinion that this <br> anomalous position of the beds ought to be a consequence of the <br> protrusion of the dykes almost perpendicular to the chief direction <br> or great axis of the elliptical chasm of the Yal di Bove When <br> Fig 5 ” View of Montagnuola <br> a Lava tavolata of the same mineralogical composition as those beds be- <br> longing to uppermost lava-currents of the Piano del Lago the same which make <br> their appearance in the interior of the Cisterella where I observed 15 beds super- <br> posed one on the other <br> b Lava of the eruption of Montagnuola <br> c Cone of eruption ; ejected cinders and capilli <br> \a is to c as Somma cratere de soulevemenf is to Vesuvius volcan ' <br> studying the remarkable Montagnuola on the southern extremity <br> of that part of the edge of the valley which stretches from N to S 36161659 111474 51125 Page 120 Text v 15 http //www biodiversitylibrary org/page/36161659 1859 Geological Society of London NameFound Vesuvius volcan Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 15 1859 Geology Periodicals Smithsonian Libraries bhl page 36161659 dc identifier http //biodiversitylibrary org/page/36161659 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-07 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12981368984 2015-08-26 14 56 21 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1859 Photos uploaded from Flickr by Fæ using a script | ||||
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