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| Keywords: The Quarterly journal of the Geological Society of London (12893907944).jpg Vol 53- <br> SUPERFICIAL DEPOSITS IN CTJTCH <br> 235 <br> them It will be seen that beyond calling some of the rocks ' ashy ' <br> and ' trappoid ' and speaking of ' trappean blotches ' the author <br> speaks of nothing but grits It is true that in some parts they are so <br> much and so irregularly discoloured apparently by infiltration that <br> they then bear a superficial resemblance to some rocks of volcanic <br> origin but their essentially gritty nature is unaltered <br> The best exposure is on the northern slope of the hill where the <br> section shown in fig 3 is seen Here the bulk of the hill is corn- <br> Fig 3 ” Infratrappean grits at Bliujia Hill <br> A Jurassic rocks <br> B Infratrappean grits <br> C Trap <br> posed of the Jurassic sandstones which on the western side rise <br> up and meet the capping of basalt East of this junction there <br> comes in rapidly a series of thick beds of very porous character <br> all of which are laminated but not conformably to the base on <br> which they lie Their porous character gives them a very ' ashy ' <br> appearance ” that is the appearance of fine debris deposited in the <br> open air; but they are almost entirely composed of sand-grains <br> lying in a loose matrix of finer dust and are so like some of <br> the samples of subreceht concrete that without labels they can <br> scarcely be distinguished in hand-specimens The laminae run up <br> to and meet the basalt above and as we pass eastward the deposit <br> becomes thinner till the basalt and Jurassic sandstones come together <br> again The other patches referred to as lying in the open hollows <br> are generally darker and more compact but they are still sandy <br> The isolation of this and similar deposits at Khirgreea and Rhojla ; <br> its occurrence in a shelter-spot on an old Jurassic hill ; its porous <br> character and sandy composition all point to an seolian origin <br> representing as they do the same conditions as those represented by <br> the subrecent concrete <br> The second type of deposit at Sanosra due south of Bhuj and <br> at Artara between the Jurassic rocks and the trap is simply a <br> collection of stones derived from the rocks below cemented by finer <br> material and lying in hollows over which the trap passes that is <br> to say it is the surface-debris of the land on which the lava was <br> poured out <br> r2 36029014 111130 51125 Page 235 Text 53 http //www biodiversitylibrary org/page/36029014 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 36029014 dc identifier http //biodiversitylibrary org/page/36029014 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 N02/12893907944 2015-08-26 17 57 26 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1897 Photos uploaded from Flickr by Fæ using a script | ||||
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