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| Keywords: The Quarterly journal of the Geological Society of London (12645172465).jpg 1848 <br> MURCHISON ON THE STRUCTURE OF THE ALPS <br> 285 <br> ¢ <br> u <br> 6 mass of marls and sands strikes W S W and E N E <br> g and that such is also the strike of the principal mass <br> S of the mottled nummulitic limestone and of the grand <br> masses of conglomerate sand and marl which consti- <br> tute the higher and highly inclined miocene strata in <br> the ridges of the Superga and Monferrato <br> The nummulitic limestone may be considered <br> as an irregular axis which throws off partially a few <br> younger and broken beds to the north that form the <br> gypseous and other hillocks on the banks of the Po <br> and pass under the pliocene strata of Verrua and <br> S Crescentino ; whilst it is manifestly succeeded on the <br> ¢S south by the whole ascending series of the Superga <br> – and Monferrato <br> It is also equally clear that this nummuhtic rock <br> is truly tertiary if we judge from the other fossils <br> I associated with the Nmmnidina placentula Desh <br> S Thus the terebratula on which Collegno reckoned as a <br> S proof of cretaceous age is now known to be a common <br> I species of the older tertiary of this tract In this very <br> limestone we found the great oyster O gig ant ea <br> fragments of pectens and corals and above all the <br> tooth of a fish Oxyrhina Desori Ag all well-known <br> tertiary forms Again in the sandy beds absolutely <br> resting on those dislocated limestones the Pecten Bur- <br> digalensis with Pectunculi and Turbinolise occur and <br> there is therefore no sort of doubt of the age of the <br> rock <br> I was much struck with the resemblance of the <br> mottled concretionary and coralline limestone of Gas- <br> sino to the rock of Castel-Cucco between Asolo and <br> g Possagno which is also the uppermost limit of num- <br> 2 mulites p 222 I therefore consider that in con- <br> necting the nummulitic base of the section of the <br> Superga with a well-known band in the clear succession <br> on the flanks of the Venetian Alps I establish a con- <br> necting link between the eocene deposits of the Alps <br> and the miocene of northern Italy <br> In traversing southwards to Bardassan across the <br> ridges of conglomerate both coarse and fine A which <br> g occupy the chief summits and separate the valleys <br> j excavated in the softer marl or sandy shale I had <br> I little to observe that is not already known ; for these <br> j elevations and depressions are the direct eastern pro- <br> longations of the miocene of the Superga ; but in <br> descending from the hills to the south by Castel Mont- <br> alto to the plain of Chieri the development of the <br> strata and the gradual change from the miocene into <br> the pliocene type is too remarkable not to be specially <br> noticed On the south slope of the hill of Bardassan <br> VOL V PART I X 35268929 109512 51125 Page 285 Text v 5 http //www biodiversitylibrary org/page/35268929 1849 Geological Society of London NameFound Nmmnidina placentula NameFound Oxyrhina NameConfirmed Oxyrhina EOLID 4534808 NameBankID 177942 NameFound Pecten NameConfirmed Pecten EOLID 10719936 NameBankID 2692292 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 5 1849 Geology Periodicals Smithsonian Libraries bhl page 35268929 dc identifier http //biodiversitylibrary org/page/35268929 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 N02/12645172465 2015-08-27 10 54 40 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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