The Middle Jurassic Ravenscar Group (‘Deltaic Series’) of Yorkshire: Recent sedimentological studies as demonstrated during a field meeting 2–3 May 1980

Livera, S. E.; Leeder, M. R.

doi:10.1016/s0016-7878(81)80051-x

Cited by 37 publications

(17 citation statements)

References 7 publications

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“…Modified from Milsom and Rawson (1989); Mjøs and Prestholm (1993); Cox and Sumbler (2002); Palliani and Riding (2000); Slater et al (2015). Livera and Leeder 1981;Fisher and Hancock 1985;Kantorowicz 1985;Alexander 1989Alexander , 1992Riding and Wright 1989;Gowland and Riding 1991;Rawson and Wright 2000;Powell 2010). The Ravenscar Group provides an exceptional example of extensive Middle Jurassic terrestrial sequences and the plethora of plant fossils (e.g., van Konijnenburg-van Cittert and Morgans 1999) and dinosaur footprints Romano 1993, 2001a,b;Romano et al 1999;Romano and Whyte 2003;Whyte et al 2006Whyte et al , 2007Whyte et al , 2010 make the Cleveland Basin an important region for paleontology.…”

Section: Geological Settingmentioning

confidence: 99%

A quantitative comparison of dispersed spore/pollen and plant megafossil assemblages from a Middle Jurassic plant bed from Yorkshire, UK

Slater

Wellman

2015

Paleobiology

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Abstract.-Detailed quantitative data has previously been collected from plant megafossil assemblages from a Middle Jurassic (Aalenian) plant bed from Hasty Bank, North Yorkshire, UK. We conducted a similar analysis of palynological dispersed sporomorph (spore and pollen) assemblages collected from the same section using the same sampling regime: 67 sporomorph taxa were recorded from 50 samples taken at 10 cm intervals through the plant bed. Basic palynofacies analysis was also undertaken on each sample. Both dispersed sporomorph and plant megafossil assemblages display consistent changes in composition, diversity (richness), and abundance through time. However, the dispersed sporomorph and plant megafossil records provide conflicting evidence for the nature of parent vegetation. Specifically, conifers and ferns are underrepresented in plant megafossil assemblages, bryophytes and lycopsids are represented only in sporomorph assemblages, and sphenophytes, pteridosperms, Caytoniales, Cycadales, Ginkgoales and Bennettitales are comparatively underrepresented in sporomorph assemblages. Combined multivariate analysis (correspondence analysis and nonmetric multidimensional scaling) of sporomorph occurrence/abundance data demonstrates that temporal variation in sporomorph assemblages is the result of depositional change through the plant bed. The reproductive strategies of parent plants are considered to be a principal factor in shaping many of the major abundance and diversity irregularities between dispersed sporomorph and plant megafossil data sets that seemingly reflects different parent vegetation. Preferential occurrence/preservation of sporomorphs and equivalent parent plants is a consequence of a complex array of biological, ecological, geographical, taphonomic, and depositional factors that act inconsistently between and within fossil assemblages, which results in notable discrepancies between data sets.

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Section: Geological Settingmentioning

confidence: 99%

A quantitative comparison of dispersed spore/pollen and plant megafossil assemblages from a Middle Jurassic plant bed from Yorkshire, UK

Slater

Wellman

2015

Paleobiology

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“…1b). These represent mostly paralic, fluvial and lacustrine successions deposited at a time of regional uplift and associated sea-level fall Hemingway and Knox 1973;Livera and Leeder 1981;Alexander 1989Alexander , 1992Powell 2010).…”

Section: Geological Settingmentioning

confidence: 99%

“…The Moor Grit Member comprises coarse channel sandstones, which are overlain by finer-grained sandstones, siltstones and mudstones of the Long Nab Member. The Long Nab Member at Burniston Bay represents localised channel sediments, and also includes an exceptionally preserved meander plain (Ielpi and Ghinassi 2014) that accumulated in a coastal plain setting (Nami and Leeder 1978;Hancock and Fisher 1981;Livera and Leeder 1981;Fisher and Hancock 1985).…”

Section: Geological Settingmentioning

confidence: 99%

Dinosaur-plant interactions within a Middle Jurassic ecosystem—palynology of the Burniston Bay dinosaur footprint locality, Yorkshire, UK

Slater

Wellman

Romano³

et al. 2017

Palaeobio Palaeoenv

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Dinosaur footprints are abundant in the Middle Jurassic Ravenscar Group of North Yorkshire, UK. Footprints are particularly common within the Bathonian Long Nab Member of the Scalby Formation and more so within the socalled 'Burniston footprint bed' at Burniston Bay. The Yorkshire Jurassic is also famous for its exceptional plant macrofossil and spore-pollen assemblages. Here we investigate the spore-pollen record from the dinosaur footprint-bearing successions in order to reconstruct the vegetation and assess possible dinosaur-plant interactions. We also compare the spore-pollen assemblages with the macroflora of the Scalby Ness Plant Bed, which occurs within the same geological member as the Burniston succession. The spore-pollen assemblages are dominated by Deltoidospora spp., the majority of which were probably produced by Coniopteris. Lycophyte spores (including megaspores) are common in the Yorkshire Jurassic, but lycophyte parent plants are extremely poorly represented in the macroflora. Seed ferns, represented by Alisporites spp., are moderately abundant. Conifer pollen assemblages are dominated by Araucariacites australis (probably produced by Brachyphyllum mamillare), Perinopollenites elatoides and Classopollis spp., with additional bisaccate pollen taxa. Abundant Ginkgo huttonii in the macroflora suggests that much of the monosulcate pollen was produced by ginkgoes. The diverse vegetation of the Cleveland Basin presumably represented an attractive food source for herbivorous dinosaurs. The dinosaurs probably gathered at the flood plains for fresh-water and also used the non-vegetated plains and coastline as pathways. Although assigning specific makers to footprints is difficult, it is clear that a range of theropod, ornithopod and sauropod dinosaurs inhabited the area.

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“…12.9 and 12.11), have a tangential base, and are largely exposed in a dip section. The oppositely directed ripples near the steep lee side front of the dune are known as backflow ripples (Johansson, 1963), or, less frequently, named regressive (Jopling, 1961), countercurrent (Allen, 1965), counterflow (Livera and Leeder, 1981), reversed climbing (Tillman and Ellis, 1968), or return-flow ripples (Reesink and Bridge, 2009). 12.11).…”

Section: Palaeoflow Reconstruction With Emphasis On Bottomset Characmentioning

confidence: 99%

Fluvial to tidal transition zone facies in the McMurray Formation (Christina River, Alberta, Canada), with emphasis on the reflection of flow intensity in bottomset architecture

Martinius¹,

Jablonski²,

Fustic³

et al. 2015

Developments in Sedimentology

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The Middle Jurassic Ravenscar Group (‘Deltaic Series’) of Yorkshire: Recent sedimentological studies as demonstrated during a field meeting 2–3 May 1980

Cited by 37 publications

References 7 publications

A quantitative comparison of dispersed spore/pollen and plant megafossil assemblages from a Middle Jurassic plant bed from Yorkshire, UK

A quantitative comparison of dispersed spore/pollen and plant megafossil assemblages from a Middle Jurassic plant bed from Yorkshire, UK

Dinosaur-plant interactions within a Middle Jurassic ecosystem—palynology of the Burniston Bay dinosaur footprint locality, Yorkshire, UK

Fluvial to tidal transition zone facies in the McMurray Formation (Christina River, Alberta, Canada), with emphasis on the reflection of flow intensity in bottomset architecture

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