<i>Cyprideis torosa</i>(Jones, 1850) in its type area and stratigraphical context: potential for mapping the freshwater/estuarine boundaries of the Thames–Medway river system in the MIS 9 and MIS 11 interglacials

Horne, David J.; Benardout, Ginny; Whittaker, John E.

doi:10.1144/jmpaleo2015-037

Cited by 4 publications

(3 citation statements)

References 24 publications

(21 reference statements)

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“…Sedimentological features and meiofauna content suggest a back-barrier (brackish) depositional setting subject to moderate levels of energy at the bottom. The remarkable abundance of the silt fraction and vegetal remains, the CU trend and the occurrence of a mesohaline species (C. fuscata; [61,82]) commonly found in association with the euryhaline C. torosa within tidal-influenced sub-environments [85,86] point to a flood-tidal delta, likely its distal fringes. This interpretation is consistent with the occurrence of scattered valves of hypohaline ostracods.…”

Section: Discussionmentioning

confidence: 99%

A Long-Term Record of Quaternary Facies Patterns and Palaeonvironmental Trends from the Po Plain (NE Italy) as Revealed by Bio-Sedimentary Data

Rossi¹,

Amorosi²,

Barbieri³

et al. 2021

Geosciences

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Understanding Quaternary dynamics of delta-coastal plains across multiple glacial-interglacial cycles in the Milankovitch band (~100 kyrs) is crucial to achieve a robust evaluation of possible environmental response to future climate-change scenarios. In this work, we document the long-term bio-sedimentary record of core 204 S16 (~205 m long), which covers a wide portion of the post-MPR (Mid-Pleistocene Revolution) interval, taking advantage of the highly subsiding context of the SE Po Plain (NE Italy). Detailed facies characterization through an integrated sedimentological and meiofauna (benthic foraminifers and ostracods) approach allowed for the identification of a repetitive pattern of alluvial deposits alternating with four fossiliferous, paralic to shallow-marine units (Units 1–4). The transgressive surfaces identified at the base of these units mark major flooding events, forced by Holocene (Unit 4), Late Pleistocene (Unit 3) and Middle Pleistocene (Units 1, 2) interglacials. Distinct stratigraphic patterns typify the Middle Pleistocene interval, which includes coastal-marine (tidal inlet and bay) deposits. In contrast, lagoonal sediments record the maximum marine influence in the Late Pleistocene-Holocene succession. As a whole, the meiofauna tracks a regressive trend, with the deepest conditions recorded by the oldest Unit 1 (MIS 9/11 age?).

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Section: Discussionmentioning

confidence: 99%

A Long-Term Record of Quaternary Facies Patterns and Palaeonvironmental Trends from the Po Plain (NE Italy) as Revealed by Bio-Sedimentary Data

Rossi¹,

Amorosi²,

Barbieri³

et al. 2021

Geosciences

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“…It should also be noted, in consideration of the evidence from Upper Dovercourt, that upstream equivalents within the contemporaneous Thames system of the Clacton Channel intertidal deposits reach ~10 m O.D. at East Hyde, near Tillingham [124][125][126][127][128][129]. Further afield, in the Fen Basin at Woodston (near Peterborough) and in the valley of the River Nar (near Kings Lynn), tidally influenced deposits of less certain age-equivalence to Dovercourt reach ~14 m and ~23 m, respectively.…”

Section: Spring Meadow School Upper Dovercourtmentioning

confidence: 99%

Mid-Late Quaternary Fluvial Archives near the Margin of the MIS 12 Glaciation in Southern East Anglia, UK: Amalgamation of Multi-Disciplinary and Citizen-Science Data Sources

Allen¹,

Bain²,

Bridgland

et al. 2022

Quaternary

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This paper presents an updated geological reconstruction of the Quaternary evolution of the River Thames at its downstream extremities, close to the North Sea coast, based on new data from multi-disciplinary and citizen-science sources. In this area, the interaction of the Thames with the MIS 12 (Anglian) glaciation is an important part of the Quaternary archive. The Anglian ice sheet, which reached parts of north and east London, was responsible for diverting the Thames southwards into its present course, although the footprint of the maximum ice sheet(s) does not reach the North Sea coast south of Hollesley, Suffolk. Further south, the coastal zone hosts pre-Anglian and early Anglian river-terrace deposits of the pre-diversion Thames system, superimposed upon which are products of later post-Anglian rivers, of both Middle and Late Pleistocene age. On the peninsula between the Stour and Blackwater–Colne estuaries, the lowest and most recent terrace of the pre-diversion Thames includes evidence directly pertaining to the glacial disruption event, for which geochronological data are reported here for the first time. The first post-diversion terrace of the Thames also reaches this peninsula, the river having essentially re-joined its original valley before crossing the alignment of the modern coastline. This terrace passes beneath Clacton-on-Sea, where it includes the type locality of the Clactonian Palaeolithic Industry. The area of interest to this paper, in NE Essex and southern Suffolk, includes a number of interglacial and Palaeolithic sites, the data from which assist in constraining the chronostratigraphy of the sequence. In some cases, there has been uncertainty as to whether these sites represent pre-Anglian environments and hominin occupations, part of the palaeo-Thames sequence, or whether they are the product of later post-Anglian streams, formed after the Thames had migrated southwards. This paper compiles evidence from a wide range of recent sources, including developer-funded archaeological appraisal and citizen-science activities, to explore and update the evidence from sites at Ipswich, Upper Dovercourt and Thorpe-le-Soken, as well as a number of localities associated with the Clacton Channel Deposits (host to the type-Clactonian), amongst others. The resulting new data are placed within the wider context of the Quaternary fluvial archives in southern Britain, with a discussion of how disparate sources of information, including the work of citizen scientists, have contributed.

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“…Horne, Benardout & Whittaker (2016) examine the occurrence of torosa and associated ostracods from (marine isotope stage) MIS 9 and MIS 11 interglacial deposits of the early Thames-Medway river system by comparison with the study of ostracod biofacies in the modern Thames Estuary of Kilenyi (1969).…”

Section: The Papersmentioning

confidence: 99%

Cyprideis torosa: a model organism for the Ostracoda?

Lord

2017

Journal of Micropalaeontology

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Cyprideis torosa(Jones, 1850) in its type area and stratigraphical context: potential for mapping the freshwater/estuarine boundaries of the Thames–Medway river system in the MIS 9 and MIS 11 interglacials

Cited by 4 publications

References 24 publications

A Long-Term Record of Quaternary Facies Patterns and Palaeonvironmental Trends from the Po Plain (NE Italy) as Revealed by Bio-Sedimentary Data

A Long-Term Record of Quaternary Facies Patterns and Palaeonvironmental Trends from the Po Plain (NE Italy) as Revealed by Bio-Sedimentary Data

Mid-Late Quaternary Fluvial Archives near the Margin of the MIS 12 Glaciation in Southern East Anglia, UK: Amalgamation of Multi-Disciplinary and Citizen-Science Data Sources

Cyprideis torosa: a model organism for the Ostracoda?

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