A revised correlation of Tertiary rocks in the British Isles and adjacent areas of NW Europe

King, Chris

doi:10.1144/sr27

Cited by 83 publications

(115 citation statements)

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“…Biostratigraphic studies and clinoform geometries reported in previous more localized studies suggest paleo-water depths of 100 -300 m in the deepest part of the basin (e.g. Overeem et al 2001;Huuse 2002;Kuhlmann 2004;King 2016), in agreement with the present study. The lack of slope features on the basal Quaternary surface, as well as limited evidence for extensive facies change between the topset and the slope, is suggestive of the sediment source for the clinoforms being located a significant distance from the clinoform break point (Posamentier & Vail 1988;Mulder & Alexander 2001;Mulder et al 2003).…”

Section: Onset Of the Quaternarysupporting

confidence: 93%

“…The C. grossus event is known to be diachronous across the North Sea Basin owing to the depth dependence of the species but is still considered, in mid-to outer-neritic environments (i.e. the clinoform topsets of the southern North Sea) to correspond to the onset of the Quaternary (King 2016 ; Fig. 4).…”

Section: Chronostratigraphic Calibrationmentioning

confidence: 99%

“…4). Thus, C. grossus is not considered to be a good marker for the basal Quaternary (King 2016). As the M. pseudotepida event is well preserved to the Josephine-1 borehole and correlated across the entire southern North Sea to the basal Quaternary, unlike C. grossus, this event was used to map the basal Quaternary across the rest of the basin for the first time (Figs 2 and 5).…”

Section: Chronostratigraphic Calibrationmentioning

confidence: 99%

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The early Quaternary North Sea Basin

Lamb

Harding

Huuse

et al. 2017

JGS

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The onset of the Quaternary (2.58 Ma) corresponds to significant paleo-environmental events, such as the intensification and southward extension of Northern Hemisphere glaciation. In the North Sea Basin a significant late Cenozoic succession has been identified as a high-resolution archive of paleo-environmental changes during the Pliocene and Pleistocene. However, the identification of the base of the Quaternary has been a long-standing issue owing to lack of stratigraphic calibration. This study incorporates continuous, regional 3D seismic data with high-quality chronostratigraphic markers to map the base-Quaternary surface at high resolution across the entire North Sea. Depth conversion, backstripping, seismic geomorphology and sedimentation rate calculations are integrated to analyse the paleogeographical evolution of the North Sea Basin and its infill of c. 83 × 10 3 km 3 of northward prograding marine to deltaic sediments. The basin is 600 km long from SSE to NNW and largely localized above residual topography of the Mesozoic graben system. During the earliest Quaternary (2.58 -2.35 Ma) paleo-water depths were c. 300 ± 50 m and solid sedimentation rates (calculated from 0% porosity) c. 32 km 3 ka −1 . The base-Quaternary provides an important marker for further studies of the changing environment of the Quaternary of NW Europe as well as resource and shallow geohazard analysis.Supplementary material: A base Quaternary two-way travel time structure map is available at https://doi.org/10.6084/m9. figshare.c.3900343

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Section: Onset Of the Quaternarysupporting

confidence: 93%

Section: Chronostratigraphic Calibrationmentioning

confidence: 99%

Section: Chronostratigraphic Calibrationmentioning

confidence: 99%

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The early Quaternary North Sea Basin

Lamb

Harding

Huuse

et al. 2017

JGS

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“…According to King (1981King ( , 1984King ( , 2016, the FAD of the dinoflagellate Dracodinium varielongitudum is in the lower part of division C in the London area and the FAD of Charlesdownieia coleothrypta occurs in the upper part of division D at Sheppey with that dinoflagellate zone being recorded up to the top of division E. The FAD of C. coleothrypta is correlated to the middle part of calcareous nannoplankton zone NP12 and dated to ca. 52.7 Ma by Vandenberghe et al (2012, Fig.…”

Section: Stratigraphic Context Of Florasmentioning

confidence: 99%

“…The stratigraphic context of all the Ypresian and Lutetian floras from southern England is summarized by Hooker and Collinson in Collinson (1996) and by Collinson and Cleal (2001). Further discussion of the London Clay Formation geology and stratigraphy can be found in Friedman et al (2015) and King (2016).…”

Section: Stratigraphic Context Of Florasmentioning

confidence: 99%

X-ray micro-computed tomography (micro-CT) of pyrite-permineralized fruits and seeds from the London Clay Formation (Ypresian) conserved in silicone oil: a critical evaluation

Collinson

Adams

Manchester

et al. 2016

Botany

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Pyrite-permineralized fruits and seeds from the London Clay Formation (Ypresian; England) in the NHMUK are stored in silicone oil to retard decay processes. X-ray micro-computed tomography (micro-CT) has revealed internal morphology for multiple holotypes (including severely cracked and encrusted specimens) scanned in the protective fluid. Silicone oil alone has a similar X-ray attenuation to parts of the specimens, causing minor uncertainty for digitally rendered surfaces, but key systematic characters are readily visualized. Further work is needed to optimize visualization of fine-scale cellular detail. Labelling and segmentation to visualize important structures is achievable with these micro-CT datasets. However, manual labelling of individual slices is required, and defining boundaries between features can be difficult due to differential pyritization and silicone oil permeation. Digital sections through specimens can be made in any orientation and digital locule casts can be produced for studies in virtual taphonomy. These achievements have been accomplished with minimal risk to specimens, which remained in silicone oil and were studied within the museum. The datasets provide a potentially permanent record of at-risk specimens, can be made widely available to researchers unable to visit the collections and to other interested parties, and they enable monitoring for future conservation.Key words: early Eocene, fossil plants, fruits and seeds, London Clay Formation, micro-CT, Natural History Museum, London (NHMUK). Résumé :Des fruits et des graines perminéralisées à la pyrite de la formation de London Clay (Yprésien ; Angleterre) sont conservés au NHMUK dans l'huile de silicone pour retarder le processus de dégradation. La micro-tomographie aux rayons-X assistée par ordinateur (micro-CT) a révélé la morphologie interne de plusieurs holotypes (y compris des spécimens sévèrement fissurés et incrustés) balayés dans le liquide protecteur. L'huile de silicone seule présente une atténuation des rayons-X similaire aux parties des spécimens, causant une incertitude mineure en ce qui concerne les surfaces interprétées de manière digitale, mais les caractères systématiques clés sont rapidement visualisés. Du travail supplémentaire est nécessaire afin d'optimiser la visualisation de détails cellulaires à échelle fine. Le marquage et la segmentation pour visualiser les structures importantes sont réalis-ables avec ces jeux de données en micro-CT. Cependant, le marquage manuel de sections individuelles est néces-saire et il peut être difficile de définir les frontières entre les éléments à cause de la pyritisation et la perméance

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Flooding of a carbonate platform: The Sian Kaʼan Wetlands, Yucatán, Mexico—A model for the formation and evolution of palustrine carbonate factories around the modern Caribbean Sea and in the depositional record

Platt¹,

Wright

2023

The Depositional Record

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The dynamic inter‐relationships between marine and freshwater carbonate depositional environments are illustrated in the Sian Ka'an Wetlands, a 5 280 km2 complex of groundwater‐fed freshwater marshes, lakes and brackish coastal lagoons in the South‐East Yucatán Peninsula (Mexico). The Yucatán Platform was subaerially emergent and extensively karstified during the last glacial maximum at 18, 000 yr bp. The Late Holocene transgression has caused progressive reflooding of the continental margin, backstepping of the MesoAmerican Reef and encroachment of coastal environments into the platform interior as rising groundwaters flood an interconnected cave and sinkhole system and feed seasonal marshes above. The Sian Ka'an Wetlands form a vast palustrine carbonate factory which is directly juxtaposed and dynamically linked with the marine carbonate factory to seaward. Continuing sea‐level rise has caused synchronous landward migration of marginal marine and freshwater environments as beach barriers were breached and palustrine sloughs flooded to form marginal marine seagrass lagoons. The Rio Hondo Fault conditions fluid inflow while the sub‐environments of the Sian Ka'an Wetlands reflect tectonic controls on microtopography and hydroperiod. Modern analogues for the Sian Ka'an Wetlands include the Florida Everglades, formed during transgression of the Florida Platform, and relict marsh environments preserved on leeward shores of Andros, Abaco and other Bahama islands. A wide range of ancient examples deposited in coastal and continental interior settings similarly reflect seasonal aquifer rise in response to marine transgression and/or onlap of late‐stage basin fill onto a karstified pediment. Freshwater palustrine carbonate factories on carbonate platforms are transient deposystems, controlled by subtle water depth, climate, vegetation and hydrological factors while being critically sensitive to sea‐level changes and tectonics. The preservation potential of palustrine carbonates may be relatively low in coastal settings due to erosion or shallow marine overprinting, while greater further inland where marine flooding is rarer and in tectonically subsident continental interior basins where accommodation space is continuously created.

show abstract

A revised correlation of Tertiary rocks in the British Isles and adjacent areas of NW Europe

Cited by 83 publications

References 0 publications

The early Quaternary North Sea Basin

The early Quaternary North Sea Basin

X-ray micro-computed tomography (micro-CT) of pyrite-permineralized fruits and seeds from the London Clay Formation (Ypresian) conserved in silicone oil: a critical evaluation

Flooding of a carbonate platform: The Sian Kaʼan Wetlands, Yucatán, Mexico—A model for the formation and evolution of palustrine carbonate factories around the modern Caribbean Sea and in the depositional record

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