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| Keywords: The Quarterly journal of the Geological Society of London (12645174895).jpg 290 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY Dec 13 <br> c <br> rt _0 5j o <br> O bo <br> whicli succeeds to the west for the latter is only <br> slightly inclined to the east and is a hard mica- <br> ceous true macigno sandstone which flaglike <br> near the surface passes down into thick beds <br> This rock receiving its peculiar tint from nu- <br> merous minute fragments of black schist is un- <br> distinguishable from the macigno alpin or flysch <br> of the Alps It occurs in fact on the western <br> edge of those great undulations of alberese and <br> other limestones which perforated by serpentine <br> at Monte Berici and Sasso di Castro near Covi- <br> gliajo form the chief mass of that group already <br> spoken of whose geological equivalents in the <br> absence of fossils it is so difficult to define <br> Thus whilst the Bolognese Apennines expose <br> an intimate connection between the miocene and <br> pliocene groups they aiford as far as I saw no <br> indications of an unbroken succession from the <br> macigno to the overlying miocene It appeared <br> indeed to me that in descending towards Flo- <br> rence by Campo Santo and Crespiano a conglo- <br> merate probably miocene was there also adherent <br> to the sides of the mountains of older date ; but <br> in that portion of Tuscany the union between the <br> miocene and pliocene as above described is <br> wanting <br> The picturesque hills around Lari on the south <br> side of the Arno near Pisa which I visited with <br> Professor Pilla are for the most part composed <br> of subapennine blue marl loaded with shells and <br> covered by yellow sands ; the Ostrea hippopuSy <br> Pecten laticostatus and large Panopcea Favjasi <br> lying about in abundance The villages stand <br> on insulated points of the overlying sands or <br> sandy marls the remnants of former great de- <br> nudations all the strata being horizontal These <br> elevated sandy and loamy points are rich and <br> fertile whilst the denuded argillaceous marls of <br> the valleys are sterile ; � physical features which <br> so prevail in vast tertiary tracts throughout Italy <br> that the agricultural characters alone are there <br> sufficient to indicate the age of the strata Near <br> Casciano however to the south of Lari as well <br> seen in the quarries of S Frediana other and <br> lower sandstones of harder character rise out <br> abruptly from beneath the subapennine cover <br> and form broken and undulating domes These <br> beds contain highly ornamented small Echini <br> small Ostreae and other shells together with <br> fishes' teeth and palates unknown in the overlying 35268934 109512 51125 Page 290 Text v 5 http //www biodiversitylibrary org/page/35268934 1849 Geological Society of London NameFound Echini NameConfirmed Echini NameFound Ostrea NameConfirmed Ostrea EOLID 10719983 NameBankID 2692450 NameFound Ostreae NameFound Pecten laticostatus NameConfirmed Pecten laticostatus Gray 1835 NameFound Pilla NameConfirmed Pilla NameBankID 4574946 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 5 1849 Geology Periodicals Smithsonian Libraries bhl page 35268934 dc identifier http //biodiversitylibrary org/page/35268934 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 N02/12645174895 2015-08-27 10 53 58 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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