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| Keywords: The Quarterly journal of the Geological Society of London (13205959223).jpg 250 <br> V <br> <br> Wicklow Wexford and <br> Waterford and at Bal- <br> lycotten Kinsale and <br> Castletown-bearhaven in <br> the county of Cork <br> These observations in- <br> dicate that the subsi- <br> dence in these islands <br> was general as regards <br> the southern portion of <br> their areas <br> The substratum of <br> the section described is <br> the upper portion of the <br> London clay 1 ; which <br> is here very fossiliferous <br> and dips to the north or <br> towards the chalk ridge <br> at Hilsea This however <br> is merely an undulation <br> of the strata as all the <br> lower beds are brought <br> up in succession before <br> we arrive at the chalk and the red plastic clay from <br> Stamshaw about a mile to the north is used for <br> making the dams water-tight a purpose for which <br> from its weight and tenacity it is admirably adapted <br> Resting on the London clay is the forest 2 with <br> the roots of trees in situ at a depth of 1 6 in another <br> place 29 feet below high-water It dips towards the <br> north and the inner part of the harbour Similar re- <br> mains may also be seen at low-water on the sea-coast <br> outside the harbour between South-Sea Castle and <br> Lump's Fort ; but I had not the means of ascertaining <br> in either case to what depth below the level of the <br> sea the forest extends <br> Amongst the peaty matter which is 2 feet thick in <br> the same stratum with the trees we find the Lacuna <br> Montaguei indicating the presence of very shallow salt <br> water and the growth of the Zostera marina on which <br> that mollusk feeds Over this peat is 3 a blue clay <br> 4 feet thick similar to the present estuary mud and <br> containing the common shells now found in the <br> harbour Above this clay there is a bed of shingle <br> 4 which seems to indicate that the sea at some <br> subsequent period had broken into the estuary One <br> can well imagine how the low land along this coast <br> may have been subject to such accidents indeed if <br> a violent gale or any other cause should carry away <br> the narrow neck of shingle connecting Black House <br> The Preventive Service men along the coast near Hastings <br> get their principal supply of fire-wood out of the submarine <br> forests in that neighbourhood at low spring tides 36932989 113687 51125 Page 250 Text v 3 http //www biodiversitylibrary org/page/36932989 1847 Geological Society of London NameFound Zostera marina NameConfirmed Zostera marina EOLID 1089042 NameBankID 3875217 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 3 1847 Geology Periodicals Smithsonian Libraries bhl page 36932989 dc identifier http //biodiversitylibrary org/page/36932989 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-17 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13205959223 2015-08-26 12 53 43 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1847 Photos uploaded from Flickr by Fæ using a script | ||||
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