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Volume 23: British Upper Cretaceous Stratigraphy — Chapter 05
 

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Chap 05
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Chap 06
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Figure 5.1
Location of GCR sites and other sites mentioned in the text in the Northern Chalk Province of England.

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Figure 5.2
Distribution of Chalk formations in the Northern Province of the Lincolnshire and Yorkshire Wolds (outcrop and subcrop).

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Figure 5.3
The stratigraphy of the Northern Province Chalk (compare with Figure 1.5, Chapter 1 and Figures 2.8, 2.9, 2.21, 2.22 and 2.27, Chapter 2).

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Figure 5.4
Key marker beds at the Welton–Burnham Chalk boundary, North Landing, Flamborough Head GCR site, Yorkshire. (Photo: C.J. Wood.)

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Figure 5.5
The Black Band of the Northern Province at the base of the White Chalk Subgroup and the Welton Chalk Formation. (a) The top of the Black Band to the twin marls (Inoceramus Pebble Bed) in Bigby Quarry, Lincolnshire. Note the mould of a very large ammonite (Lewesiceras, labelled ‘L’). (b) The Black Band succession of Variegated Beds in Melton Ross Quarry, Lincolnshire. (Photos: R.N. Mortimore.)

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Figure 5.6
Map of the Hunstanton Cliffs GCR site (also see Figure 5.7).

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Figure 5.7
Hunstanton Cliffs, north Norfolk coast. (Photo: A. Hutchinson.)

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Figure 5.8
The Chalk succession at Hunstanton Cliffs (compare with Figure 5.7). The higher Cenomanian beds are not present at Hunstanton, these are seen at Barrett Ringstead Chalk Pit. (M. g. = Metoicoceras geslinianum; N. j. = Neocardioceras juddii.)

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Figure 5.9
Correlation of key marker beds in the Cenomanian Grey Chalk Subgroup between the Southern Province (West Melbury Marly Chalk and Zig Zag Chalk formations), and the Northern Province (Ferriby Chalk Formation).

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Figure 5.10
The Melton Bottom Chalk Pit GCR site, East Yorkshire; type locality of the Welton Chalk Formation. (Based on British Geological Survey Sheet 80, Kingston upon Hull.)

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Figure 5.11
The Melton Bottom Chalk Pit GCR site, represented by the ‘Lower Pit’ (Melton Bottom Chalk Pit, and the ‘Upper Pit’ (Welton Wold Quarry).

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Figure 5.12
The Red Chalk and Ferriby Chalk succession at Melton Bottom Chalk Pit (the ‘Lower Pit’ at Melton, Figure 5.11) (N. = Neostlingoceras). (After Whitham, 1991.)

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Figure 5.13
The stratotype section for the Welton Chalk Formation at Welton Wold Quarry (the ‘Upper Pit’ at Melton, Figure 5.11). (After Whitham, 1991, fig. 5.)

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Figure 5.14
The Welton Chalk Formation in the Northern Province, Melton Ross Quarry, Lincolnshire. (a) The lower part of the Welton Chalk Formation marker marl seams. Note the typical conjugate fractures characteristic of this Chalk. (b) The Chalk Hill Marls and the First Main Flint at the boundary between the Mytiloides spp. and Terebratulina lata zones. This is effectively correlated to the boundary between the Holywell Nodular Chalk and New Pit Chalk formations of the Southern Province. (Photos: R.N. Mortimore.)

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Figure 5.15
The location of Enthorpe Railway Cutting and other field sections in the Yorkshire Wolds.

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Figure 5.16
The Enthorpe Railway Cutting GCR Site, exposing the Burnham Chalk Formation from just above the Ulceby Marl to a level above the Easthorpe Tabular Flints in the Beachy Head Zoophycos Beds.

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Figure 5.17
Enthorpe Railway Cutting in the highest Turonian and Lower Coniacian Burnham Chalk Formation. (a) North side of cutting looking NNW. (b) South side of cutting looking south-east. (Photos: C.J. Wood.)

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Figure 5.18
The Burnham Chalk Formation section exposed in the abandoned Enthorpe Railway Cutting, Yorkshire Wolds.

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Figure 5.19
Location of key sections in the Flamborough Head GCR site.

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Figure 5.20
The oldest and youngest Chalk exposed on the Yorkshire coast of Flamborough Head. (a) The youngest chalk south of Sewerby Steps in the Flamborough Chalk Formation. This chalk is flintless but contains numerous marl seams. (b) The oldest chalk is at the base of Speeton Cliff in the Hunstanton Red Chalk Formation (HRCF, labelled). This chalk is flintless, but contains numerous flaser marl seams and nodular chalk layers. (Photos: R.N. Mortimore.)

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Figure 5.21
The Hunstanton Red Chalk and Ferriby Chalk formations at Speeton Cliff, Yorkshire, showing the stable isotope *13C curve used to identify the Albian–Cenomanian boundary, between peaks 2 and 3. (Modified from Mitchell, 1995a, fig. 11.)

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Figure 5.22
The Cenomanian Ferriby Chalk Formation at Speeton Cliff–Buckton Cliffs, Yorkshire (compare with Figures 5.20b, 5.21, 5.23 and 5.24). For explanations of bed abbreviations, see text.

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Figure 5.23
Lower and central part of the Ferriby Formation at Buckton Cliffs, Flamborough, East Yorkshire. (The ‘6 Band Group’ of limestones of Jeans = ‘The Bank’ at Southerham Grey Pit; the rib of Limestone = ‘The Rib’ of Southerham Grey Pit.) (Photos: Dr C.V. Jeans, University of Cambridge.)

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Figure 5.24
Upper part of the Ferriby Chalk Formation (Cenomanian) at Buckton Cliffs, Flamborough, East Yorkshire. (Nettleton Stone = approximate position of the base of the Acanthoceras jukesbrownei Zone; P/B Break = Plantonic/Benthic ratio change, the approximate position of the Turrilites costatus–acutus subzonal boundary.) (Photos: Dr C.V. Jeans, University of Cambridge.)

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Figure 5.25
Looking east onto the cliffs at North Landing, Flamborough Head, Yorkshire, where the Welton–Burnham Chalk boundary is well exposed. Spectacular Paramoudra flints are present in the basal unit of the Burnham Chalk Formation. (Photo: C.J. Wood.)

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Figure 5.26
The Welton Chalk and basal Burnham Chalk formations at the Flamborough Head GCR site between Speeton Cliff and North Landing. (After Mitchell, 2000; and unpublished logs of C.J. Wood.)

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Figure 5.27
Chalk cliffs on the east side of Breil Nook, Flamborough Head, Yorkshire, illustrating rhythmically bedded Burnham Chalk Formation with flint bands (Micraster cortestudinarium and M. coranguinum zones). These inaccessible cliffs have never been measured or properly interpreted. (Photo: A.A. Morter.)

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Figure 5.28
The ‘disturbed zone’ at Selwicks Bay, Flamborough Head, Yorkshire. The series of faults displaces the chalk by 23 m down to the south, bringing Flamborough Chalk against Burnham Chalk. (Photos: R.N. Mortimore.)

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Figure 5.29
Correlation from Stottle Bank across the Selwicks Bay Fault to Flamborough Head (High Stacks) with inferred biostratigraphy.

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Figure 5.30
Formation of sea stacks and the Flamborough Fault Zone at Selwicks Bay, Flamborough Head, Yorkshire. (Photo: Cambridge University Collection of Aerial Photography: copyright reserved).

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Figure 5.31
A simplified true scale section of the highest Burnham Chalk Formation and Flamborough Chalk Formation from Stottle Bank to the Sewerby Steps Quaternary cliff section. For details of the highest Burnham Chalk and basal Flamborough Chalk formations, see Figure 5.29.

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