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Volume 26: British Middle Jurassic Stratigraphy — Chapter 05
 

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Chap 01
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Chap 04
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Chap 05
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Chap 06
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Figure 5.1
Structural setting of the Cleveland Basin. (After Rawson and Wright, 1995, fig. 2.)

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Figure 5.2
Lithostratigraphy of the Middle Jurassic rocks of Yorkshire. At its type locality, the Scarborough Formation has been divided into seven members (Parsons, 1977b; Gowland and Riding, 1991). From below, these are named Helwath Beck, Hundale Shale, Hundale Sandstone, Spindle Thorn Limestone, Ravenscar Shale, White Nab Ironstone and Bogmire Gill. Not to scale.

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Figure 5.3
Geological sketch map showing the location of the GCR sites described in Chapter 5. (1) Whitwell Quarry; (2) Gristhorpe Bay, Yons Nab and Red Cliff–Cunstone Nab; (3) Osgodby Point; (4) South Toll House Cliff; (5) North Bay, Scarborough; (6) Hackness Rock Pit; (7) Havern Beck, Saltergate; (8) Hudson’s Cross Crags, Newton Dale; (9) Fairy Call Beck; (10) Iron Scar–Hundale and Hundale Point–Scalby Ness; (11) Blea Wyke; (12) Hawsker Bottoms.

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Figure 5.4
Summary of main lithologies and depositional environments of the North Yorkshire coast Middle Jurassic succession. (Compiled from various sources; see text.)

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Figure 5.5
Part of the old quarry face at the Whitwell Quarry GCR site showing Whitwell Oolite overlain by Upper Limestone. The figure’s hand rests on the top surface of the Whitwell Oolite. (Photo: M.G. Sumbler.)

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Figure 5.6
Facies distribution sketch map of the Whitwell Oolite and the Millepore Bed which together form the transgressive leaf of the Lebberston Member. (After Hemingway, 1974, fig. 51.)

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Figure 5.7
Locality map for Gristhorpe Bay, Yons Nab and Red Cliff–Cunstone Nab.

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Figure 5.8
Diagrammatic cross-section of the cliffs at the south-eastern end of Cayton Bay. (After Rawson and Wright, 1992, fig. 24.)

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Figure 5.9
Red Cliff Rocks and Red Cliff Fault. The fault is in the gully and downthrows to the west (right of photo); the Millepore Bed is exposed between tides in the foreground. (Photo: British Geological Survey, No. A5487, 1931.)

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Figure 5.10
Collapora straminea (Phillips) – the bryozoan, originally called Millepora straminea, that gives its name to the Millepore Bed. (Reproduced (×4) from Phillips, 1835, pl. 9, fig. 1.)

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Figure 5.11
Examples of fossil plants from the Gristhorpe Plant Bed. (a) Leaf Sagenopteris phillipsi (Brongniart); (b) leaf Nilssonia compta (Phillips); (c) restoration of male cone Androstrobus manis Harris; (d) restoration of female cone Beania gracilis Carruthers. ((a) and (b) natural size (redrawn from British Museum (Natural History), 1975), (c) and (d) × 0.5 (redrawn from Hughes, 1976).)

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Figure 5.12
Gristhorpe Bay. In the middle distance is the headland Yons Nab and in the far distance Scarborough. (Photo: British Geological Survey, No. L1342; reproduced with the permission of the Director; British Geological Survey, © NERC, 1974.)

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Figure 5.13
High Red Cliff, Cayton Bay. (Photo: British Geological Survey, No. A5488, 1931.)

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Figure 5.14
Diagrammatic cross-section of the Callovian succession on the coast south of Scarborough. (After Wright, 1968, fig. 3.)

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Figure 5.15
Graphic section of Callovian–Oxfordian boundary sequence on the north side of Osgodby Point. (After Wright, 1969, fig. C4.)

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Figure 5.16
Members of the Oxfordian and Kimmeridgian working groups of the International Subcommission on Jurassic Stratigraphy sampling the Callovian–Oxfordian boundary sequence on the north side of Osgodby Point. (Photo: K.N. Page.)

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Figure 5.17
Castle Hill (a faulted outlier of Middle and Upper Jurassic rocks) (centre distance) and South Bay, Scarborough. (Photo: M.G. Sumbler.)

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Figure 5.18
Neotype of Macrocephalites terebratus (Phillips); The Natural History Museum, London, specimen No. 39566; natural size. (Photo: © The Natural History Museum.)

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Figure 5.19
Neotype of Peltoceras athleta (Phillips); The Natural History Museum, London, specimen No. 89052; approximately natural size. (Photo: © The Natural History Museum.)

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Figure 5.20
Part of the uncoloured lithograph of William Smith’s map of Hackness with the location of the Hackness Rock Pit GCR site added. (Modified from Sheppard, 1917, pl. 17.)

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Figure 5.21
Havern Beck, Saltergate. The Cornbrash Formation is well exposed behind the waterfall. (Photo: K.N. Page.)

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Figure 5.22
Simplified distribution map of the subdivisions of the Cornbrash Formation in the Cleveland Basin showing thicknesses (in metres) at the GCR sites. (After Wright, 1977, fig. 3.) = Figure 5.23 Stream-bed exposure of the Cornbrash Formation in Fairy Call Beck near Fairystones Bridge. (Photo: K.N. Page.)

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Figure 5.24
Correlation between the sections at Fairy Call Beckand Havern Beck. (After Wright, 1978, fig. 2.)

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Figure 5.25
Locality map for Iron Scar–Hundale and Hundale Point–ScalbyNess.

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Figure 5.26
Graphic section of coastal exposures between Cloughton Wyke and Scalby Ness. (After Rawson and Wright, 1995, fig. 9.)

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Figure 5.27
Cloughton Wyke and cliffs from Hundale Point; the cliff in the foreground is Moor Grit Member, the reefs on the right Scarborough Formation. The reefs at the projecting headlands in the distance are formed by the Millepore Bed (Lebberston Member) and Eller Beck Formation. (Photo: British Geological Survey, No. A5494, 1931.)

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Figure 5.28
Ripple-marked sandstone (Gristhorpe Member), north side of Cloughton Wyke. (Photo: British Geological Survey, No. A5497, 1931.)

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Figure 5.29
Dinosaur footprint in the Burniston Footprint Bed. (Photo: D.N. and J.K. Wright; reproduced with permission of the Geologists’ Association.)

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Figure 5.30
Scalby Bay foreshore showing ‘meander-belt complex’ of the Long Nab Member. (Photo: J.K. Wright; reproduced with permission of the Geologists’ Association.)

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Figure 5.31
Blea Wyke Sandstone Formation (Lias Group) overlain by the Dogger Formation. (Photo: British Geological Survey, No. A5504, 1931.)

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Figure 5.32
Diagrammatic cross-section through the Peak Fault at Ravenscar and adjoining cliffs. (After Rawson and Wright, 1992, fig. 13.)

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Figure 5.33
Modified version of Hudleston’s (1874) diagram showing the stratal units and marker beds in the Dogger Formation on the northern side of Blea Wyke (approximately to scale; see Figure 5.31).

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Figure 5.34
Waterfall exposure of the Scarborough Formation north of Bottom Lane, Hawsker Bottoms. (Photo: M.G. Sumbler.)

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