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| Keywords: The Quarterly journal of the Geological Society of London (12893575733).jpg Vol 53 SUPERFICIAL DEPOSITS IX CUTCH 233 <br> blown sand present so as to make a greater slope the weathered <br> blocks which fell on it from the hills would under the influence of <br> the rains saturating the sand below slip gently forward along the <br> slope supported by the underlying sand till they reached their <br> farthest destination without sinking to the bottom Thus the <br> aeolian deposits have served as the carrier see fig 2 <br> Fig 2 Boulder-beds in the north of Patcham <br> A Boulder-beds <br> B Subrecent concrete <br> C Jurassic rocks <br> D Hypothetical former extension of <br> concrete with boulders <br> This explanation is analogous to that made use of by Sir Wyville <br> Thomson to account for the forward motion of the stone-river in <br> the Falkland Islands 1 and if it be a true one it is possible that it <br> may in some cases account for deposits of loose blocks which have <br> been referred to glacial action There will always be antagonism <br> between this process and the running away of the water in definite <br> channels and at last when the slope of the aeolian deposits became too <br> low the growth of the mounds would cease and the streams would <br> begin to sensibly denude the deposits and even cut channels in the <br> bed-rock It might be thought that all along the rain would wash <br> the sand away and let the boulders drop but we see that as a matter <br> of fact it does not ; besides which the boulder itself protects the <br> sand below it as in the case of earth- pillars and what is washed <br> away above or below will be replaced by the next dust-storm <br> 3 Infratrappean Grits <br> These deposits lying as they do below the traps cannot in strictness <br> be called superficial but it will be seen that they were probably of <br> that character that is deposited on the land before the traps <br> were poured on the top of them This is what Mr Wynne says of <br> them 'These form a peculiar soft loosely granular and obscurely <br> stratified group of earthy and sandy rocks largely composed of <br> trappean materials they are frequently associated with the base <br> of the stratified traps but they also occur in separate patches over <br> the country and sometimes at a considerable distance from them <br> They are clearly beneath the trap in some localities ; in others they <br> fill up hollows in the Jurassic beds the planes of stratification not <br> i ' Nature ' vol xr 1876 p 359 <br> Q J G S No 210 r 36029012 111130 51125 Page 233 Text 53 http //www biodiversitylibrary org/page/36029012 1897 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 53 1897 Geology Periodicals Smithsonian Libraries bhl page 36029012 dc identifier http //biodiversitylibrary org/page/36029012 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 N02/12893575733 2015-08-26 17 58 08 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1897 Photos uploaded from Flickr by FĂŚ using a script | ||||
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