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| Keywords: The Quarterly journal of the Geological Society of London (12733920315).jpg 492 <br> T BELT ON THE STEPPES OF SIBERIA <br> Fig 2 Section of <br> Strata at Omsk <br> Fig 3 Section of Strata at Pavlodav <br> 1 1 foot surface-soil <br> 2 20 feet stratified red- <br> dish-brown sand with <br> lines of small gravel <br> 3 8 feet light - coloured <br> sandy silt <br> 4 15 feet coarse clean <br> sand with lines of <br> small pebbles and <br> one line of coarser <br> pebbles at X ˘ <br> 5 6 feet clayey unlami- <br> nated silt with frag- <br> ments of bed-rock in <br> lower half <br> 6 Magnesian limestone <br> much crashed and <br> broken at top <br> strata exposed; but 20 miles south of Pavlodav I noticed that the <br> surface soil contained many small subangular pebbles ; and having <br> already determined that the sand and pebbles had come from the <br> south towards which I was travelling I was on the look-out for <br> larger stones The country was now of a more undulating character <br> and there were many shallow salt lakes When 60 miles from <br> Pavlodav in the middle of the night the wheel of the tarantass for the <br> first time in a journey of nearly 1000 miles jolted over a stone ; and <br> on getting out I found there were many angular pieces of quartz <br> lying en the surface from 3 to 4 inches in diameter <br> After this the stones increased in number and size ; and 20 miles <br> further south the surface-soil was full of large angular boulders of <br> quartz some of which were 8 feet across Many large tabular <br> masses of quartz rock looked as if in situ ; but several of them bad <br> been quarried to build the enclosures of the government station and <br> they were seen to have rested in and on a sandy clay containing <br> few other stones There was nothing about these boulders or the <br> clay in which they rested to suggest that they were moraine accu- <br> mulations ; they were distributed over a nearly level plain as if they <br> had been dropped from floating ice <br> Beyond this point southwards the bed-rock often comes to the <br> surface in ridges and low hills of highly metamorphosed crystalline <br> rocks separated by level plains composed of a sandy clay with <br> numerous small angular stones invariably of the rocks seen in situ 35766413 110599 51125 Page 491 Text v 30 http //www biodiversitylibrary org/page/35766413 1874 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 30 1874 Geology Periodicals Smithsonian Libraries bhl page 35766413 dc identifier http //biodiversitylibrary org/page/35766413 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-24 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12733920315 2015-08-26 19 55 14 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1874 Photos uploaded from Flickr by FĂŚ using a script | ||||
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