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| Keywords: The Quarterly journal of the Geological Society of London (12895317534).jpg 1864 <br> BIGSBY MISSING SEDIMENTARY FORMATIONS <br> 199 <br> S <br> 2Q <br> SQ <br> » <br> - <br> TS -j <br> Wo <br> «S« <br> « <br> 2 a <br> c5 <br> VOL XX PART I <br> by steps The general idea of any advance <br> arrives first and may perhaps lie dormant <br> for years when follows its development by <br> another workman and perhaps in another <br> country ; just as Vicomte d'Archiac in <br> 1848 sketched in unmistakeable language <br> the principal features of the great Terripetal <br> Theory which Bronn in 1862 made his <br> own by the most masterly elaboration <br> ” Ami Boue in 1852 having prepared the <br> way by an elaborate article in the ' Bul- <br> letin de la Societe Geologique de France ' <br> 2nd series vol ix p 437 While in their <br> vertical order of succession the sedimentary <br> rocks never vary unless disturbed they differ <br> greatly in thickness and extent ” far stretch- <br> ing out and thin in plains thick and limited <br> in area among mountains as we see <br> abundantly verified in the Americas India <br> Russia c But they have also been from <br> the very earliest periods largely and fre- <br> quently absent from their normal situa- <br> tions and much more so than appears in <br> systematic works; and it is easy to see <br> from the vast and universal prevalence of <br> these suspensions and removals of deposits <br> that it will be one day proved that the <br> emerged tracts were at all periods so ex- <br> tensive and so united as to constitute from <br> one-fifth to one-third of the whole surface <br> of the globe <br> While any given district was in a state of <br> emergence various sediments were being <br> deposited in the neighbouring sea which <br> was at the same time tenanted by a fauna <br> so balanced and harmonized that the indi- <br> viduals could thrive and follow the prompt- <br> ings of their instincts ” whole races dying <br> out we may safely suppose Now if only <br> one such epoch commence become mature <br> and decline we see that the raised land must <br> have remained as such for an immensely <br> long period What then must have been <br> the length of that period of time during <br> which an emerged tract remained through <br> ten or twenty epochs above water as has <br> frequently occurred Missing formations <br> then hold a high and important place as a <br> result of one of the constructive processes of <br> Canada Hudson's Bay Germany c c <br> P 36089442 111261 51125 Page 199 Text v 20 http //www biodiversitylibrary org/page/36089442 1864 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 20 1864 Geology Periodicals Smithsonian Libraries bhl page 36089442 dc identifier http //biodiversitylibrary org/page/36089442 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-03 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12895317534 2015-08-26 16 58 48 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1864 Photos uploaded from Flickr by Fæ using a script | ||||
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