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London Clay Magnetozone

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Journal Article
Published: 01 September 1986
Journal of the Geological Society (1986) 143 (5): 729–735.
... and 24B are represented within Divisions D to B2 of the London Clay, and anomaly 26 is represented in the lower part of the Thanet beds. An additional normal polarity magnetozone within the Oldhaven beds is believed to represent a short normal polarity event between anomalies 24B and 25. Anomalies 22...
Journal Article
Published: 01 December 1985
Journal of the Geological Society (1985) 142 (6): 957–982.
.... Eight discrete normal polarity magnetozones have been identified within this dominantly reverse polarity interval. Three of these lie within the Bracklesham Group, three within the London Clay Formation, one in the Oldhaven 'Formation', and one within the lowermost part of the Thanet Formation. Assuming...
Journal Article
Published: 01 April 1988
Journal of the Geological Society (1988) 145 (2): 351–360.
... 8 10 1987 © Geological Society of London 1988 1988 Geological Society of London References Anderson F. W. Ostracods from the Weald Clay of England Bulletin of the Geological Survey of Great Britain 1967 27 237 69 As J. A. Instruments and measuring methods...
Journal Article
Journal: Geology
Published: 01 August 2004
Geology (2004) 32 (8): 653–656.
... when fluvial incision was dominant erosion process. Solid blue dots indicate clay percentage in W4 and MD972122 (periodic influxes of coarse sediment, released by landsliding, with reduced clay content create double line of dots in magnetozone 4). Dashed vertical line indicates mean for all early...
FIGURES
Journal Article
Published: 01 April 2015
Russ. Geol. Geophys. (2015) 56 (4): 652–662.
...: biostratigraphic (base of the Pseudosubplanites grandis Subzone) or magnetostratigraphic (base of the M18r magnetozone). The Jurassic and Cretaceous Systems, which are very rich in fossils, occur widely in Eurasia, North America, and South America; also, they can be found in Africa, Australia, and Antarctica...
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Journal Article
Published: 01 December 1985
Journal of the Geological Society (1985) 142 (6): 1179–1188.
... magneto- zones (London Clay 1, 2) correspond to 24B or 24A, and 24A or 23B, respectively. Glaucony is rare in the London Clay and of poor quality; nevertheless, one date is available, from a level correlated with the London Clay 2 magnetozone, as 50.9 f 2.2Ma. The error term is large, but the date lies...
Journal Article
Published: 17 April 2018
Journal of the Geological Society (2018) 175 (4): 594–604.
.... 2011 ; French et al. 2014 ; Suan et al. 2015 ; McArthur et al. 2016 ; Percival et al. 2016 ; Xu et al. 2017 , 2018 ). © 2018 The Author(s). Published by The Geological Society of London 2018 © 2018 The Author(s) This is an Open Access article distributed under the terms...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2000
GSA Bulletin (2000) 112 (3): 394–412.
... of interbedded conglomerates, sandstones, siltstones, and clays (Fig. 5) . These often occur in fining-upward sequences 15–20 m thick. Paleocurrent indicators are to the southwest (Fig. 5) . At 2400 m, there is a return to the conglomerate-dominated facies, with very little sandstone and finer material...
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Journal Article
Published: 01 August 1993
Journal of the Geological Society (1993) 150 (4): 661–664.
... et la stratigraphic Palaeovertebrata 1980 9 155 203 Ali J. A Magnctostratigraphic study of Paleogene sediments from the London Basin Tertiary Research 1990 11 207 Ali J. King C. Hailwood E. A. Magnctostratigraphy of the Early Eocene leper Clay, Belgium...
Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 16 May 2018
Lithosphere (2018) 10 (4): 530–544.
... China. The Xiaxian Conglomerate consists of thick conglomerate layers interbedded with thin sandstone and claystone layers, more than 110 m thick, deposited above the Paleozoic limestone in the east ( Fig. 4 ). The gravels are sub-rounded or sub-angular, and medium-sorted, mixed with red clay...
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Journal Article
Published: 22 July 2016
Journal of the Geological Society (2017) 174 (1): 56–74.
... exposed between Langstone Rock and Teignmouth, adjacent to the main London–Penzance railway line ( Ussher 1913 ; Selwood et al. 1984 ), but large parts are inaccessible owing to rail-safety restrictions. The Dawlish Sandstone Fm was sampled in quarries near Exeter (4 and 5 in Fig. 1 ; Fig. 4...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2007
GSA Bulletin (2007) 119 (3-4): 413–427.
... spacing of ∼80 cm. They stated that: “the chosen sample spacing was too wide to describe the shorter magnetozones completely” (see also Figure 3 of Lowrie et al., 1982 ). A higher-resolution paleomagnetic reinvestigation was implicitly suggested by this statement. In order to: (1) improve...
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Journal Article
Published: 01 May 2007
Journal of the Geological Society (2007) 164 (3): 685–688.
...) with C13n, but Hooker et al . suggest a correlation with a short normal subchron within C13r (C13.1n). Mammal evidence from Serral (presence of MP19/20 in C15n) might suggest that the Bembridge normal polarity zone is actually C15n, but supporting evidence is required of a normal magnetozone equivalent...
FIGURES
Journal Article
Published: 01 March 2013
Russ. Geol. Geophys. (2013) 54 (3): 335–348.
... , silty clay; 3 , organic-rich clay; 4 , fractured rock; 5 , condensed phosphatized limestone layer (PLL); 6 , carbonate concretions; 7 , pyrite ( a ), glauconite ( b ); 8 , normal polarity; 9 , reversed polarity (magnetozones defined by no adjacent specimens of the same polarity, are indicated...
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Journal Article
Journal: AAPG Bulletin
Published: 01 April 1993
AAPG Bulletin (1993) 77 (4): 569–587.
... determined by early compaction ( Irving, 1957 ; Lovlie, 1974 , 1976 ) when water saturation in sediments is reaching 30% ( Khramov, 1968 ) at a depth of 2.5 m, for example, in clays ( Hamano, 1980 ). If water percentage in sediments is still high enough, slumping or bioturbation do not disturb the primary...
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Journal Article
Journal: Geosphere
Published: 01 June 2011
Geosphere (2011) 7 (3): 802–829.
... specimens due to poor-quality data. Shin.—Shinarump; Pet. For.—Petrified Forest; Can.—Canyon. The Six Mile Canyon section, north-central Zuni Mountains, yields a predominantly reverse polarity magnetozone ( Fig. 10E ). The site immediately below the tuffaceous sandstone that provided the detrital...
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Journal Article
Published: 27 March 2020
Geological Magazine (2020) 157 (11): 1767–1780.
.... Magnetostratigraphic studies of the P/T boundary in the HCM were performed by Nawrocki (Nawrocki, 1997 ; Nawrocki et al. 2003 ), who located it at the base of the Tbn1 magnetozone (=LT1n) correlated with the Siodła and Jaworzna formations. Table 1. Analysed boreholes and outcrops with top and bottom...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2016
GSA Bulletin (2016) 128 (3-4): 609–626.
... is a pale-yellow or gray fine-grained capping layer, which is often clay rich ( Fig. 3E ). These layers range in thickness from ∼1 mm to ∼1 cm and may be simple or multilayered. They may have sharp, horizontal bases or gradational, undulose bases. Thicker turbidite beds are more likely to be capped...
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Journal Article
Journal: GSA Bulletin
Published: 08 May 2018
GSA Bulletin (2018) 130 (11-12): 1791–1808.
... and calcareous nannoplankton ( Flores, 1987 ; Sierro et al., 1993 ), is the Gibraleón Formation ( Civis et al., 1987 ). This marine unit consists of greenish-bluish clays including glauconitic silts at the base. The contact between the Niebla and Gibraleón Formations is interpreted as a condensation level...
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Journal Article
Journal: GSA Bulletin
Published: 23 June 2021
GSA Bulletin (2021)
... for stratigraphic context), zircon-bearing silicified clay- sured Tweefontein sections are shown. (A) which is interpreted as a maximum age for the stone occurs, and interpreted Inclined portion of ichnotaxon Katbergia time of deposition. normal polarity magnetozone, carltonichnus (Gastaldo and Rolerson, 2008...