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Volume 26: British Middle Jurassic Stratigraphy — Chapter 04
 

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Figure 4.1
Geological sketch map showing the location of the GCR sites described in Chapter 4. (1) Woodeaton; (2) Ardley Cuttings and Quarries; (3) Stratton Audley; (4) Blisworth Rectory Farm; (5) Roade Railway Cutting; (6) Irchester Old Lodge Pit; (7) Finedon Gullet; (8) Cranford St John; (9) Thrapston; (10) Peterborough Brickpits; (11) Collyweston; (12) Ketton Quarry; (13) Clipsham Quarry; (14) Castle Bytham; (15) Sproxton Quarry; (16) Copper Hill; (17) Metheringham; (18) Greetwell Quarry; (19) Cliff Farm Pit; (20) Manton Stone Quarry; (21) Eastfield Quarry; (22) Drewton Lane Pits.

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Figure 4.2
Lithostratigraphical classification of Aalenian–Bajocian rocks in the East Midlands Shelf area. Columns are deliberately separated one from the other because of the tenuous nature of some correlations. Vertical ruling indicates non-sequence. (Based on data in Ashton, 1977, 1980; Horton et al., 1987; Gaunt et al., 1992; Wyatt, 1996a,b.)

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Figure 4.3
Main subdivisions of the Lincolnshire Limestone Formation in the Stamford–Grantham– Lincoln area.

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Figure 4.4
Lithostratigraphical classification of the Bathonian and overlying Callovian rocks in the southern part of the East Midlands Shelf area. Columns are deliberately separated one from the other because of the tenuous nature of some correlations. Vertical ruling indicates non-sequence. (Based on data in Bradshaw, 1978; Cripps, 1986; Horton et al., 1987; Page, 1989; and Wyatt, 1996a.) (KF = Kellaways Formation.)

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Figure 4.5
Graphic section of the Bathonian succession in the quarry at Woodeaton. (After Horton et al., 1995, fig. 9.)

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Figure 4.6
The quarry at Woodeaton; flaggy limestones of the Forest Marble Formation overlie a complete White Limestone Formation, with a fault of c. 3 m downthrow. (Photo: British Geological Survey, No. A15356; reproduced with the permission of the Director, British Geological Survey, © NERC, 1991.)

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Figure 4.7
The quarry at Woodeaton; west face showing faults with terminal bending of beds. (Photo: British Geological Survey, No. A15358; reproduced with the permission of the Director, British Geological Survey, © NERC, 1991.)

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Figure 4.8
Graphic section of the Bathonian succession at the Ardley Cuttings and Quarries GCR site.

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Figure 4.9
Ardley–Fritwell railway cutting (Ardley Cuttings and Quarries GCR site) showing the White Limestone Formation. (Photo: British Geological Survey, No. A9865; reproduced with the permission of the Director, British Geological Survey, © NERC, 1960.)

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Figure 4.10
Stratigraphically useful nerineid gastropod species. (A,B) Aphanoptyxis excavata sp. nov.; (A) OUM J29500 holotype; (B) OUM J29501 paratype; White Limestone Formation, Shipton Member, Excavata Bed; Sturt Farm (or Whitehill North) Quarry, Burford, Oxfordshire. (C,D) Aphanoptyxis langrunensis (d’Orbigny); (C) UP 77/50, Hydrequent, Pas de Calais, France; (D) UP EC/43; White Limestone Formation, Ardley Member, Bed 14 of Barker (1976); Eton College Quarry, Asthall, Oxfordshire. (E,F) Eunerinea arduennensis (Buvignier); (E) UP Sl.H.Ox./5/296; (F) UP Sl.H.Ox/5/23; White Limestone Formation, Ardley Member, Bed 5 of Barker (1976); Slape Hill, Wooton, Oxfordshire. (G,H) Aphanoptyxis ardleyensis Arkell; (Ga) OUM J829 lectotype; (Gb) OUM J828 paratype; (H) OUM J830 paratype; White Limestone Formation, Ardley Member, Ardleyensis Bed; Ardley-Fritwell railway cutting, Ardley, Oxfordshire. (I) Aphanoptyxis bladonensis Arkell; OUM J840 holotype; White Limestone Formation, Ardley Member, Bladonensis Bed; Orchard Quarry, Bladon, Oxfordshire. (OUM = Oxford University Museum UP = University of Portsmouth.)

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Figure 4.11
The southern face of the partly flooded quarry at Stratton Audley showing the White Limestone Formation overlain by the Forest Marble Formation. The formational boundary is marked by the white arrow. (Photo: M.G. Sumbler.)

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Figure 4.12
Graphic section of the Bathonian succession at the Stratton Audley GCR site.

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Figure 4.13
Poorly exposed Blisworth Limestone Formation at the Blisworth Rectory Farm GCR site. (Photo: M.G. Sumbler.)

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Figure 4.14
Correlation of GCR sites between Blisworth and Wellingborough (Blisworth Rectory Farm, Roade Railway Cutting, Irchester Old Lodge Pit and Finedon Gullet).

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Figure 4.15
The brachiopods (A) Digonella digonoides (S.S. Buckman), and (B) Kallirhynchia sharpi Muir-Wood which give their names to marker horizons in the Blisworth Limestone Formation. ((B) is reproduced from Muir-Wood (1938, fig. 15, 2A–C) courtesy of The Geologists’ Association.) All natural size.

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Figure 4.16
Exposure of Blisworth Limestone Formation at Roade Railway Cutting; view looking north from the overbridge at the southern end. (Photo: M.G. Sumbler.)

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Figure 4.17
Irchester Old Lodge Pit; general view of former ironstone pit showing bared bed of ironstone (Northampton Sand Formation) and overburden of Grantham, Rutland and Blisworth Limestone formations. (Photo: British Geological Survey, No. A8194, 1945.)

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Figure 4.18
The section at Finedon Gullet showing the Blisworth Limestone Formation overlying mainly grass-covered Rutland Formation. (Photo: M.G. Sumbler.)

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Figure 4.19
Oysters and Kallirhynchia sharpi Muir-Wood in the well-developed Sharpi Beds at Finedon Gullet. (Photo: M.G. Sumbler.)

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Figure 4.20
Looking south at the Cranford St John GCR site; the Blisworth Limestone Formation overlies the Rutland Formation. (Photo: M.G. Sumbler.)

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Figure 4.21
Graphic section of the Bathonian succession at Cranford St John.

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Figure 4.22
Facies changes at Cranford St John where the Finedon Rhythm of the Rutland Formation passes into the Blisworth Limestone Formation. (After Bradshaw and Cripps, 1983, fig. 11.)

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Figure 4.23
The quarry at Thrapston showing the Cornbrash Formation overlying the grass-covered Blisworth Clay Formation with Blisworth Limestone Formation below. (Photo: British Geological Survey, No. A8361, 1949.)

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Figure 4.24
Sketch map showing the location of some Oxford Clay Formation sites (past and present) around Peterborough (Peterborough Brickpits GCR site). (After Hudson and Martill, 1994.)

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Figure 4.25
King’s Dyke Pit, Whittlesey. Shale-planar excavator digging the Oxford Clay Formation for brick-making. The section illustrates the marked alternations of darker, brownish-grey, organic-rich mudstone and paler, more calcareous, mudstone. The excavator works down to the lowest bed of concretions in the Oxford Clay Formation (Bed 10 of Callomon, 1968; and Hudson and Martill, 1994). (Photo: British Geological Survey, No. MN26846; reproduced with the permission of the Director, British Geological Survey, © NERC, 1987.)

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Figure 4.26
Graphic section of the Peterborough Member of the Oxford Clay Formation in the Peterborough district. (After Hudson and Martill, 1994; and Duff, 1975; bed numbers follow Hudson and Martill, 1994.)

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Figure 4.27
Diagrammatic representation of the Peterborough Member faunal community. (After Hudson and Martill, 1991.)

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Figure 4.28
Collyweston Slate workings showing slates stacked before trimming and slabs laid out for ‘frosting’. (Photo: British Geological Survey, No. A8333, 1949.)

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Figure 4.29
The gastropod Phyllochilus bentleyi (Morris and Lycett) which is known locally as the Collyweston ‘water-spider’. (Reproduced from Morris and Lycett (1851–1855, pl. 3, figs 15,15a,16) courtesy of the Palaeontographical Society.) All natural size.

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Figure 4.30
Lincolnshire Limestone Formation at Ketton Quarry. The boundary between the Lower and Upper Lincolnshire Limestone is marked by a white arrow. (Photo: M.G. Sumbler.)

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Figure 4.31
Graphic section of the Lincolnshire Limestone Formation at Ketton Quarry. (After Ashton in Ashton and Hudson, 1979.)

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Figure 4.32
Graphic section of the Rutland Forma-tion at Ketton Quarry. (After Bradshaw and Cripps, 1983, fig. 5.)

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Figure 4.33
Graphic sections showing correlation of the rhythms in the Rutland Formation between Ketton, Cranford St John and Irchester. (After Bradshaw and Cripps, 1983, fig. 9.)

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Figure 4.34
Rutland Formation overlying the Upper Lincolnshire Limestone (Clipsham Member) at Clipsham Quarry. (Photo: M.G. Sumbler.)

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Figure 4.35
Lincolnshire Limestone Formation in the quarry at Castle Bytham. The boundary between the Lower and Upper Lincolnshire Limestone is marked by a white arrow. (Photo: M.G. Sumbler.)

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Figure 4.36
Graphic section of the Lincolnshire Limestone Formation at Castle Bytham. (After Ashton, 1980, figs 6,9.)

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Figure 4.37
Lincolnshire Limestone Formation overlying Northampton Sand Formation at Sproxton Quarry. The bench near to the water level is the top surface of the Northampton Sand Formation. (Photo: M.G. Sumbler.)

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Figure 4.38
Graphic sections of the Aalenian–Bajocian succession at Sproxton Quarry. (After Richardson, 1939b, fig. 40; and Ashton, 1980, fig. 6.)

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Figure 4.39
Graphic section of the Lincolnshire Limestone Formation in the quarry at Copper Hill. (After Sumbler et al., 1991, fig. 6.)

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Figure 4.40
Part of the NNW face in the quarry at Copper Hill showing the Clipsham Member (with large-scale cross-bedding dipping 20–30° northwards) and the Sleaford Member of the Upper Lincolnshire Limestone resting (near the base and marked by a hammer) on Lower Lincolnshire Limestone. (Photo: British Geological Survey, No. A15099; reproduced with the permission of the Director, British Geological Survey, © NERC, 1991.)

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Figure 4.41
Graphic section of the Lincolnshire Limestone Formation in the quarry at Metheringham. (After Ashton, 1980, figs 6,9.)

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Figure 4.42
Lower Lincolnshire Limestone in the quarry at Metheringham. The Kirton Shale Member lies beneath the overhang near the base. (Photo: M.G. Sumbler.)

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Figure 4.43
Graphic sections of the Lincolnshire Limestone Formation and underlying beds at Greetwell Quarry. (Based mainly on Richardson, 1940, fig. 29; and Ashton, 1980, fig. 6; with the highest beds as recorded by M.G. Sumbler in 1997.)

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Figure 4.44
Lower Lincolnshire Limestone at Greetwell Quarry. The Wragby Bed in the Greetwell Member is the massive bed on the left of the photograph in the lower part of the face; the paler unit in the upper part of the face is the Leadenham Member and the Kirton Shale (Kirton Shale Member of Ashton, 1980) lies near the top. The fold structure is probably a result of collapse over an ironstone mine in the Northampton Sand Formation, the top of which is visible at bottom left. (Photo: M.G. Sumbler.)

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Figure 4.45
Graphic sections of the Lincolnshire Limestone Formation at Cliff Farm Pit and Manton Stone Quarry. (Based partly on Ashton, 1975, fig. 3; lithostratigraphy based on Gaunt et al., 1992.)

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Figure 4.46
Kirton Shale overlain by Hibaldstow Limestone Member at Cliff Farm Pit. (Photo: M.G. Sumbler.)

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Figure 4.47
The brachiopods (A) Acanthothiris crossi (Walker) and (B) Parvirhynchia kirtonensis Muir-Wood; both shown at natural size and enlarged. (Reproduced respectively from Davidson, 1878, pl. 27, fig. 17; and Muir-Wood, 1939, fig. 42, 3A–C (courtesy of The Geologists’ Association)).

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Figure 4.48
Kirton Cementstone Member with Scawby Limestone at Manton Stone Quarry. (Photo: M.G. Sumbler.)

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Figure 4.49
Simplified geological sketch map showing Drewton Lane Pits and Eastfield Quarry GCR sites. (1) South Newbald Quarry; (2) Kettlethorpe Quarry; (3) South Cave Station Quarry; (4) Drewton Railway Cutting; (5) Eastfield (Everthorpe) Quarry. (After Walker, 1972, fig. 1.)

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Figure 4.50
Cave Oolite Member at Eastfield Quarry. (Photo: British Geological Survey, No. L2947; reproduced with the permission of the Director, British Geological Survey, © NERC, 1982.) = Figure 4.51 Graphic section of the Bajocian succession at Eastfield Quarry showing the approximate relationship of different authors’ bed numbers and subdivisions.

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Figure 4.52
Poorly preserved Hyperlioceras fragment from the Cave Oolite Member of Eastfield Quarry (BGS specimen number GSM 112733); scale-bar represents 50 mm. (Photo: M.G. Sumbler.)

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Figure 4.53
South Cave Station Quarry (part of the Drewton Lane Pits GCR site), showing the pale Kellaways Sand Member overlain by the darker Cave Rock Member. (Photo: M.G. Sumbler.)

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Figure 4.54
Graphic sections showing the correlation between South Cave Station Quarry and Kettlethorpe Quarry. Bed notation follows Brasier and Brasier (1978) and Page (1988) respectively.

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