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| Keywords: The Quarterly journal of the Geological Society of London (12894997703).jpg 200 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY Mar 9 <br> the earth's crust ; and the work is still going on It is not a thing <br> of the past only ; but the ocean-bottom parcelled out like the dry <br> land into geological districts is still receiving accessions from animal <br> debris and insoluble matter suspended in its waters <br> The Sections Figs 1 2 I owe to Messrs De Verneuil and <br> Collomb ; and they form one - of the results of their very extensive <br> and methodical investigation into the geology of Spain They exhibit <br> the structure of a region 150 miles long overspread by great blanks <br> which for our purpose is sufficiently explained by the sections them- <br> selves which are placed here in proof of the importance of our subject <br> Fig 2 ” Section of the Sierra Moreno Spain shoiving two great <br> Blanks in succession after MM de Verneuil and Collomb <br> N <br> Villanueva <br> Rio <br> Guadarmena Alcaraz <br> Vianos <br> a Silurian <br> b Red sandstone and variegated clay Trias <br> c Muschelkalk <br> d Calcaire Grossier <br> From an abundant supply of instances of blanks the indications <br> of an emerged surface those described in this memoir have been <br> selected as apt to our purpose and having an ascertained horizon <br> They are given in descending order each successive epoch supplying <br> the roof of a blank <br> II Instances of Blanks or Gaps <br> 1 With a Quaternary Roof ” Throughout by far the greater part <br> of the extensive countries of Norway Lapland Sweden and Finland <br> Quaternary Diluvium and Northern Drift lie directly on Laurentian <br> and Huronian rocks ; little or no deposition having taken place there <br> through 25° of longitude and 13° of latitude during the vast in- <br> terval of time between that of the contiguous formations Marks of <br> denudation are many and powerful here ; and though there are <br> patches of younger strata they do not require notice from us <br> On the opposite coast of North America all this is repeated <br> through Labrador and Canada to beyond the Upper Mississippi River <br> in a broad belt of rugged land 2000 miles long where no Mesozoic <br> nor old Tertiary rocks loose or fixed have been met with though <br> often looked for From this block of older metamorphic formations <br> another broad band of the same antiquity sprinkled with sand <br> gravel and boulders runs from Lake Superior into the Arctic Ocean <br> through Eupert's Land for 1500 miles Messrs Foster and Whit- <br> ney also remark that Between the Northern Drift of the south <br> side of Lake Superior and the Devonian there are no deposits but <br> Quart Journ Geol Soc vol xi p 500 36089443 111261 51125 Page 200 Text v 20 http //www biodiversitylibrary org/page/36089443 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 36089443 dc identifier http //biodiversitylibrary org/page/36089443 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 N02/12894997703 2015-08-26 16 58 04 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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