The stratigraphy and palaeontology of the Lower Greensand of the Hoes Farm Borehole, near Petworth, Sussex

Bristow, C. Roger; Morter, A.A.; Wilkinson, Ian P.

doi:10.1016/s0016-7878(87)80040-8

Proceedings of the Geologists' Association

1987

DOI: 10.1016/s0016-7878(87)80040-8

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The stratigraphy and palaeontology of the Lower Greensand of the Hoes Farm Borehole, near Petworth, Sussex

C. Roger Bristow

A.A. Morter²,

Ian P. Wilkinson

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Cited by 3 publications

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The effect of environmental change on early Aptian ostracods faunas in the Wessex Basin, southern England

Wilkinson

2008

Revue de Micropaléontologie

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A major phase of transgression in the Wessex Basin (southern England) during the earliest Aptian resulted in the collapse of the generally fresh water Barremian environment and the initiation of the marine mileu.Cypridea-rich faunas low in the Shepherd's Chine Member (Vectis Formation), were gradually replaced by faunas dominated by Sternbergella cornigera, Mantelliana mantelli and Theriosynoecum fittoni. This change is interpreted as indicating that salinities had passed from fresh-oligohaline to meso-and pliohaline and that ephemoral water bodies were replaced by more widespread, permanent, lagoonal waters. The ostracods from the highest part of the Vectis Formation, appear to be heralding the major transgression that was about to engulf the Wessex Basin.

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The effect of environmental change on early Aptian ostracods faunas in the Wessex Basin, southern England

Wilkinson

2008

Revue de Micropaléontologie

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Belemnite battlefields

Doyle

Macdonald

1993

LET

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Mass accumulations of belemnite rostra (‘belemnite battlefields’) are common in Mesozoic sediments, and accumulations of belemnoids are also known from older rocks. Many Recent teuthid species suffer mortality immediately after spawning, and some authors have suggested that belemnite accumulations record a similar phenomenon. Conversely, it is clear that many belemnite battlefields actually formed in an environment of net sediment loss, with current alignment and winnowing. A proposed model for the production of belemnite battlefields involves five possible pathways: post‐spawning mortality, catastrophic mass mortality, predation concentration, stratigraphical condensation, and resedimentation. Although accumulations that have not been reworked are rare, it is possible to recognise the generating agents of belemnite accumulations through their intrinsic features. A genetic classification of belemnite battlefields, based on the identified pathways, is tested through field examples in Britain and Antarctica, as well as through published examples. □Belemnites, fossil accumulations, palaeoecology, Mesozoic, Antarctica, Yorkshire.

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Early to mid-Cretaceous tectonics and unconformities of the Wessex Basin (southern England)

Ruffell

1992

JGS

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Sediment distribution patterns, time-subsidence plots, seismic data and outcrop analysis of the Lower Cretaceous (?Ryazanian-Albian) of the Wessex Basin, southern England, suggest that a number of unconformable horizons exist and that there is no single ‘late Cimmerian unconformity’ surface. A tectonic change, from areally restricted deposition in the Weald and Channel sub-basins to extensive sedimentation across the whole of southern England, began in the mid-Aptian. This change ended with transgression of basement ‘highs’ in the early Albian of the Dorset area, and later Albian of the Devon and London Platform basin margin areas: its onset can be linked to the Austrian tectonic phase of Europe. The onset of marine deposition in the Aptian is coincident with periodic transgression of the margins of the Wessex Basin throughout the Aptian-Albian. Mid-late Aptian and early/mid-AIbian transgressions were preceded by periods of erosion. The Aptian-Albian Lower Greensand is characterized by transgressive-regressive phases, suggesting a short-term controlling process (third-order eustatic changes or intra-plate mechanisms). Tectonic changes in the mid-Aptian include uplift followed by widespread subsidence. This change coincides with a time of plate reorganization in the European and North Atlantic areas.

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The stratigraphy and palaeontology of the Lower Greensand of the Hoes Farm Borehole, near Petworth, Sussex

Cited by 3 publications

References 3 publications

The effect of environmental change on early Aptian ostracods faunas in the Wessex Basin, southern England

The effect of environmental change on early Aptian ostracods faunas in the Wessex Basin, southern England

Belemnite battlefields

Early to mid-Cretaceous tectonics and unconformities of the Wessex Basin (southern England)

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