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| Keywords: The Quarterly journal of the Geological Society of London (12683215835).jpg 284 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY April 9 <br> The coal- shales of the Hunter River district are full of fossil <br> leaves and some of them consist of a mixture of coal and clay and <br> contam such an amount of hituminous matter that Mr Beaumont <br> Mineralogist to the Australian Agricultural Company has expressed <br> an opinion that gas might be manufactured from them Two seams <br> of coal only are being worked in this district ; a third is known to <br> exist but is supposed to be too thin to pay for working at present <br> It is two feet thick where seen and is situated considerably below <br> the sea-level The other two seams are from four to six feet thick <br> but contain seams of carbonaceous shale which deteriorate the quality <br> of the coal <br> At the entrance of Newcastle Harbour is a perpendicular rock <br> called Nobby' s Island once separated from the main land but <br> now united by a breakwater that has been thrown across for the <br> protection of the harbour The island exhibits a good section of <br> the rocks of the coal-field The accompanying section shows the <br> arrangement of the strata <br> Section of Nobby s Island Newcastle Harbour <br> 1 Mould <br> 2 Trap-conglomerate <br> 3 Shales with plant-remains <br> 4 Coal <br> 5 Earthy sandstones and shales <br> 6 Chert <br> 7 Imperfect sandstones and shales <br> 8 Coal <br> 9 Trap-dyke <br> The island is intersected by a trap-dyke 9 feet thick running in <br> a direction nearly S E and N W and completely decomposed from <br> the top down to the sea-level presenting only a greenish-white <br> greasy clay ; but beneath the water the dyke is perfectly sound and <br> hard ; about low-water-level it crops up through the beach and may <br> be seen at some little distance running out into the sea A bed of <br> coal the second in the series that formerly extended far beyond the <br> present limits of the island and through which the dyke passes has <br> been washed away by the waves with the exception of a few feet on <br> each side of the dyke looking like a great half-consumed log ; this 35338737 109655 51125 Page 284 Text v 12 http //www biodiversitylibrary org/page/35338737 1856 Geological Society of London NameFound Shales Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 12 1856 Geology Periodicals Smithsonian Libraries bhl page 35338737 dc identifier http //biodiversitylibrary org/page/35338737 smithsonian libraries Information field Flickr posted date ISOdate 2014-02-21 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/12683215835 2015-08-27 11 59 01 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1856 Photos uploaded from Flickr by Fæ using a script | ||||
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