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| Keywords: The Quarterly journal of the Geological Society of London (12684314643).jpg 1852 DE LA CONDAMINE REVERSED FAULT AT LEWISHAM 193 <br> other parts of England I have thought their occurrence in this <br> district worthy of remark and as heing likely to elicit the attention <br> of other observers of our tertiary beds <br> In conclusion I have to draw attention to the discovery of two <br> extinct molluscs Helix ruderata and H incarnata see fig 4 in <br> the Copford marls ” a fact of considerable importance in estimating <br> the relative age of this deposit ; and I would observe that not the least <br> interesting phsenomenon of the Copford freshwater beds is the super- <br> position of an upper member of the local boulder-formation bed <br> No 1 on the shell-marl which latter with its subjacent clays rests <br> on an earlier member of this formation ” conditions clearly pointing <br> out the age of the intercalated deposit This seems to accord also <br> with an analogous geological phsenomenon in the cliffs of Eastern <br> Norfolk and in other localities as noticed in Sir C Lyell's Manual <br> of Elementary Geology ' p 127 <br> 2 On a Reversed Fault at Lewisham <br> By the Rev H M De la Condamine A M F G S <br> A RECENT section on the northern slope of Loam-pit Hill exhibits <br> distinctly a small reversed fault in the lower tertiary strata; and <br> the comparative rarity of this phsenomenon appears to render it de- <br> sirable that its existence in this locality should be noticed <br> Fig 1 ” Section at Loam Pit Hill showing the Reversed Fault <br> Scale 6 feet l inch <br> N N w <br> S S E <br> 1 London Clay 2 Pebble Bed 3 Striped Sand <br> The accompanying section fig 1 will show its precise character <br> The average angle of fracture is 30° the displacement 6 inches Its <br> See an instance recorded by Messrs Prestwich and Morris Quart Journ <br> Geol Soc vol ii p 402 35461199 109911 51125 Page 193 Text v 8 http //www biodiversitylibrary org/page/35461199 1852 Geological Society of London NameFound H incarnata Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 8 1852 Geology Periodicals Smithsonian Libraries bhl page 35461199 dc identifier http //biodiversitylibrary org/page/35461199 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 N02/12684314643 2015-08-27 12 55 47 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1852 Photos uploaded from Flickr by Fæ using a script | ||||
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