Structure, Surface and Drainage in South-East England

Wooldridge, S. W.; Linton, David L.

doi:10.2307/620983

Cited by 36 publications

(30 citation statements)

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“…Numerous authors have inferred the presence of unmapped faults or monoclines in parts of the London Basin (Wooldridge and Linton, 1955;Muir Wood, 1990;Ellison et al, 2004), Thames Estuary (Devoy, 1979) and Essex (Greensmith and Tucker, 1980;D'Olier, 1982;Bristow, 1985) from analysis of Palaeogene, Pleistocene or Holocene sequences, terrestrial geodetic surveys, or tide gauge records. To these techniques can now be added PSI analysis.…”

Section: Basement Structuresmentioning

confidence: 99%

Geological interpretation of current subsidence and uplift in the London area, UK, as shown by high precision satellite-based surveying

Aldiss

Burke

Chacksfield

et al. 2014

Proceedings of the Geologists' Association

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Long term planning for flood risk management in coastal areas requires timely and reliable information on changes in land and sea levels. A high resolution map of current changes in land levels in the London and Thames estuary area has been generated by satellite-based persistent scatterer interferometry (PSI), aligned to absolute gravity (AG) and global positioning system (GPS) measurements. This map has been qualitatively validated by geological interpretation, which demonstrates a variety of controlling influences on the rates of land level change, ranging from near-surface to deep-seated mechanisms and from less than a decade to more than 100,000 years' duration.During the period 1997 to 2005, most of the region around the Thames estuary subsided between 0.9 and 1.5 mm a -1 on average, with subsidence of thick Holocene deposits being as fast as 2.1 mm a -1 . By contrast, parts of west and north London on the Midlands Microcraton subsided by less than 0.7 mm a -1 , and in places appear to have risen by about 0.3 mm a -1 . These rates of subsidence are close to values determined previously by studies of Quaternary sequences, but the combined GPS, AG and PSI land level change data demonstrate a new level of local geological control that was not previously resolvable.

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Section: Basement Structuresmentioning

confidence: 99%

Geological interpretation of current subsidence and uplift in the London area, UK, as shown by high precision satellite-based surveying

Aldiss

Burke

Chacksfield

et al. 2014

Proceedings of the Geologists' Association

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“…Wooldridge (1955, p. 90) remained "heavily in debt to Davis" and resented the criticism levelled at him. But, in both his Thames work and in his wider analysis of landscape development in southeast England (Wooldridge andLinton, 1939, 1955) Wooldridge has been shown to be in error by later workers (e.g. Hey, 1965;Hodgson etal, 1974;Catt and Hodgson, 1976;Gibbard, 1977;Green and McGregor, 1978;Rose, 1983;Allen etal., 1991), who addressed the problems largely from a sedimentological and lithological standpoint.…”

Section: Discussionmentioning

confidence: 99%

Early-Middle Pleistocene Beheading of the River Thames

Whiteman¹,

Rose²

2007

gpq

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This paper marks the centenary of the first of three articles by W.M. Davis on the beheading of the Thames, beginning with a statement of his capture hypothesis in 1895 and concluding with attempts to explain anomalous misfit streams in 1899 and 1909. It discusses Davis's classic thesis of river capture by slow, long-term landscape evolution and his apparent reluctance to accept the fact of rapid Quaternary climate change. In contrast, recent work based on lithostratigraphy, biostratigraphy and morphostratigraphy emphasises the dynamism of the Quaternary Period and its influence on river capture. Possible mechanisms for the beheading of the Thames, tectonism, glacial erosion and conventional Davisian river capture, and the timing of the event, are discussed. In conclusion, the paper summarises known and unknown components of the problem of the beheading of the Thames, and discusses the extent of Davis's influence on later Thames studies.Cet article marque le centenaire du premier de trois articles consacrés par W.M. Davis à la capture de la Tamise qui commençait par une déclaration de son hypothèse de capture en 1895 et concluait par des tentatives d'explication du réseau inadapté, en 1899 et 1909. L'article discute de la thèse classique de Davis de capture suivant une évolution lente, à long terme, du paysage, et son apparente réticence à accepter le fait des changements climatiques rapides survenus au Quaternaire. Par opposition, les travaux récents, fondés sur la lithostratigraphie, la biostratigraphie et la morphostratigraphie, soulignent l'importance de la période quaternaire et son influence sur les captures. Les mécanismes pouvant être responsables de la capture de la Tamise, notamment la tectonique, l'érosion glaciaire, la capture fluviale classique selon Davis, ainsi que la chronologie des événements, sont discutés. En conclusion, cet article résume les faits connus et les éléments méconnus du problème de la capture de la Tamise et discute des limites de l'influence de Davis sur les études postérieures sur la Tamise.Dieser Artikel hebt den hundertsten Jahrestag des Erscheinens des ersten von drei Artikeln von W.M. Davis ïiber die Ablenkung der Themse hervor. Dieser begann 1895 mit der Darlegung seiner Ablenkungs-Hypothese und schloss 1899 und 1909 mit Erklàrungsversuchen anomaler unteroder uberfâhiger Strômungen. Der Artikel setzt sich mit Davis' klassischer These der Flussablenkung durch langsame langzeitige Landschaftsentwicklung auseinander sowei seinem Widerstreben, die Tatsache einer schnellen Klimaverànderung im Quartâr zu akzeptieren. Im Gegensatz dazu betonen neuere Arbeiten ausgehend von Lithostratigraphie, Biostratigraphie und Morphostratigraphie die Dynamik der Quartâr-Zeit und ihren Einfluss auf die Flussablenkung. Môgliche Mechanismen bei der Ablenkung der Themse wie Tektonik, glaziale Erosion und die konventionelle Flussablenkung nach Davis, sowie der zeitliche Ablauf dieses Geschehens werden diskutiert. Abschliessend fasst der Artikel bekannte und unbekannte Elemente des Problems der Ablen...

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“…The presence of folds and faults that are not shown on current geological maps has been inferred in various parts of the London Basin (Wooldridge, 1921(Wooldridge, , 1923Wooldridge, 1926;Wooldridge and Linton, 1955), around the Thames estuary (Devoy, 1979), in Essex (Boswell, 1915;Greensmith and Tucker, 1980;D'Olier, 1982;Bristow, 1985), and in East Anglia (Bristow, 1983;Hamblin et al, 1997) from analysis of Palaeogene, Pleistocene or Holocene sequences at the surface or in boreholes, terrestrial geodetic surveys, or tide gauge records. In some cases, this work post-dates the compilation of the corresponding geological map.…”

Section: Some Examples Of Under-representation Of Faults and Its Consmentioning

confidence: 99%

Under-representation of faults on geological maps of the London region: reasons, consequences and solutions

Aldiss

2013

Proceedings of the Geologists' Association

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London lies mainly within an area of long-term tectonic stability known as the London Platform. This is characterised by relatively thin Cretaceous and Palaeogene sequences overlying Palaeozoic basement at shallow depths, less seismic activity than surrounding areas and, according to published geological maps, little faulting.However, observations of temporary exposures and borehole records, and other studies, show that in reality faults are numerous and widespread in the London region. Their relative absence on the geological maps is a consequence of past mapping methods, coupled with the relative uniformity of extensive bedrock units such as the London Clay Formation and the Chalk Group, and the widespread presence of Quaternary and anthropogenic deposits, and of urban development. However, complementary approaches to geological surveying, including the use of geophysical data and satellite-based radar interferometry, together with geological modelling in three dimensions using subsurface information, provide the means to accurately survey fault systems even in the most densely urbanised areas.Such work shows that earth movements in the London area, apparently including nearsurface fault displacements, have taken place during the late Quaternary and continue at the present. These findings are important to civil engineering projects and hydrogeological studies in the London area and to understanding local tectonic development.2

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Structure, Surface and Drainage in South-East England

Cited by 36 publications

References 0 publications

Geological interpretation of current subsidence and uplift in the London area, UK, as shown by high precision satellite-based surveying

Geological interpretation of current subsidence and uplift in the London area, UK, as shown by high precision satellite-based surveying

Early-Middle Pleistocene Beheading of the River Thames

Under-representation of faults on geological maps of the London region: reasons, consequences and solutions

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