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| Keywords: The Quarterly journal of the Geological Society of London (13960321983).jpg 274 PEOF J PBESTWICH OX THE OCCFERFXCF OF <br> subangular flints of Tertiary flint-pebbles and of angular frag- <br> ments of chert and ragstone from the Lower Greensand the pro- <br> portion of the former decreasing as we descend the valley and that <br> of the latter increasing while a few miles down at Dunks Green <br> Wealden debris appears <br> The most important patch of this t; river-drift is a little above <br> and east of Ightham at a spot called Highfield It there forms a bed <br> o gravel about 8 feet thick and 320 feet above O D or of 60 feet <br> above the Shode Lower down there are terraces of scattered river- <br> drift at Crowhurst on the right bank of the stream and on the left <br> bank between Basted and Crouch at about the same level of from <br> 300 to 320 feet Below this there is little river-drift to be met <br> with until we reach Dunks Green and Shipborne where at a level <br> of from 200 to 250 feet is another thin though better-marked <br> patch of gravel from 2 to 3 feet thick and at Broadfield on the <br> opposite side of the Shode there are a few scattered flints and <br> pebbles which may carry the river-drift to a height of 270 feet or <br> of from 140 to 150 feet above the Shode There is another small <br> patch on the ridse between the Shode and the Mote stream c r' <br> figs 2 3 4 p 272 <br> In the small portion of the Darent basin with which we have to <br> deal there are very few ' ; river-drifts There are traces of gravel <br> below Stonepit and Fuller Street which may be referred to them <br> but the best-marked patch is on a lower level in the railway-cutting <br> at Child's Bridge near Seal This latter only covers a few acres <br> is from 4 to 5 feet thick ochreous and roughly stratified It is <br> composed in greater part of Lower Greensand debris with very few <br> flints and flint-pebbles Some of the flints are pitted and others <br> stained brown and subangular <br> In the basin of the Leybourne stream a bed apparently of river- <br> gravel extends from below Offham Church at the level of 230 feet to <br> West Mailing where its level at St Leonard's Tower is from 180 <br> to 200 feet above O D It consists of subangular flints chert and <br> Tertiary pebbles in a sandy matrix There are no pits to show its <br> thickness On the other side of the stream there is a slightly <br> lower terrace described by Mr Topley capping Leybourne Hill at <br> a height of 153 feet above O D or of 75 feet above the stream and <br> traces of the same are visible at Larkfield Heath <br> There are some lower-level gravels near Byarsh but without <br> sections and the old pit on this level near Leybourne Church is <br> now closed At the junction of this valley with that of the Med- <br> way there is however a large pit on a well-marked terrace about <br> 60 feet above O D capped by an ochreous gravel composed of a <br> mixed debris of subangular flints weathered chert and Tertian- <br> flint-pebbles with a considerable proportion of Wealden pebbles f <br> Unfortunately there are neither river-shells nor Mammalian <br> remains in any of the Shode gravels to certify to their character ; <br> Mr Harrison reports one fragment of Oldbury stone ; but this may have <br> come from some of the hills west of Oldbury <br> t See Topley's ' Geology of the Weald ' p 174 36940067 113696 51125 Page 272 Text 45 http //www biodiversitylibrary org/page/36940067 1889 Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 45 1889 Geology Periodicals Smithsonian Libraries bhl page 36940067 dc identifier http //biodiversitylibrary org/page/36940067 smithsonian libraries Information field Flickr posted date ISOdate 2014-04-21 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13960321983 2015-08-26 05 50 36 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1889 Photos uploaded from Flickr by Fæ using a script | ||||
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