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| Keywords: The Quarterly journal of the Geological Society of London (12736464255).jpg 780 <br> E HILL AND T ft BONNET ON THE <br> on the Map Stcward's-Hay Spring on the continuation of the blue <br> patch which marks the quartzite quarry The patch is rightly con- <br> tinued on the Map to within the wood ; but the syenite on which <br> nearly all the latter grows is only indicated as existing near the <br> house a quarter of a mile further north The quarry is small old <br> and quite shallow ; and a pheasant-feeding house stands on its <br> floor On the north side is rather coarse ashy slate much jointed ; <br> on the south is syenite which becomes a little more finely crystal- <br> line but only a little as it approaches the slate We found the <br> junction at the right-hand corner of the pit and traced it some way <br> across the floor No one accustomed to examine junctions of igneous <br> and sedimentary rock can for a moment donbt the nature of this <br> The line of contact is wavy and slightly irregular Further careful <br> examination shows a large piece of slate caught up by and included <br> in the syenite see fig 6 ; from this we succeeded in obtaining <br> Fig 6 ” Syenite intrusive in Slate Steward' s-Hay Spring Pit in <br> Bradtjate-House Wood <br> a Syenite b Slate c Debris and vegetation partly covering up the <br> joint-face of the slate which seems to have passed in places almost along the <br> junction so as to leave a flake of slate adhering to the syenite <br> junction specimens which we have since subjected to microscopic <br> examination The result of this fully confirms were there any need <br> of it the evidence of the section <br> About 250 yards further west north of the walk in the midst of <br> the brushwood we again found the syenite and slate in contact <br> Here also though the slate is more highly altered than at the other <br> spot the nature of the junction is quite as evident The irregular <br> line of contact can be traced for several feet ; and a few feet below <br> it is another bed of ashy slate into which also the syenite can be <br> seen to intrude The slate at each of these places bears a consider- <br> able resemblance to that of the slate-quarry in Bradgate Park ” an <br> additional evidence for the identity of the quartzite beds in the two <br> localities <br> At the point on the Map where there is a dip-arrow under the <br> L of Linford banded slates can be traced up to within a yard even <br> less if a projecting fragment be really in situ of the syenite The <br> latter somewhat changes its character as it approaches the slate 35818963 110705 51125 Page 786 Text 33 http //www biodiversitylibrary org/page/35818963 1877 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 33 1877 Geology Periodicals Smithsonian Libraries bhl page 35818963 dc identifier http //biodiversitylibrary org/page/35818963 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 N02/12736464255 2015-08-26 19 53 51 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1877 Photos uploaded from Flickr by Fæ using a script | ||||
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