A (tidal-marine) boulder pavement in the late Cenozoic of Seymour Island, West Antarctica: contribution to the palaeogeographical and palaeoclimatic evolution of West Antarctica

Rocha-Campos, A. C.; Kuchenbecker, Matheus; Duleba, Wânia; Santos, Paulo Roberto dos; Canile, Fernanda Maciel

doi:10.1017/s0954102017000335

Cited by 2 publications

(2 citation statements)

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“…Our recognition of the HGF and WSF is based on their known distributions on Seymour Island and their characteristic lithofacies (Gaździcki et al 2004, Marenssi et al 2010, Montes et al 2013, Rocha Campos et al 2017. On Seymour Island, the HGF can be recognized by its two main lithofacies: the lower muddy, matrix-supported diamictite and the upper pebbly sandstone (Marenssi et al 2010), while the WSF also consists of a muddy, matrix-supported diamictite, but it shows a higher density of clasts (Gaździcki et al 2004).…”

Section: Methodsmentioning

confidence: 99%

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Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica

Badaró

Petri

2019

Antarctic Science

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Here we describe new microfossil assemblages for the Miocene Hobbs Glacier Formation and the first possibly indigenous assemblages for the Plio-Pleistocene Weddell Sea Formation on Seymour Island, West Antarctica. The assemblages are composed mainly of foraminifers, but radiolarians, calcitarchs and poriferan sclerites are also present. For the Hobbs Glacier Formation, we report the foraminifers Bolivina sp., Oolina globosa and Rosalina cf. globularis; and for the Weddell Sea Formation, we report Favulina hexagona, Globigerinita uvula, Globocassidulina cf. subglobosa and Psammosphaera fusca. The low abundance and diversity of microfossils, allied with the complex taphonomical processes that prevailed in Antarctic glacial–marine palaeoenvironments, make it impossible to define whether the assemblages are composed of a mixture of indigenous and re-elaborated specimens or exclusively of re-elaborated remains. Nevertheless, the indigenous nature of some specimens is suggested by their inherent fragility, excellent preservation and/or taxonomic association with indigenous assemblages from correlated strata. The taxonomic compositions are not directly comparable with other Antarctic assemblages, although most of the species were previously reported from pre-Quaternary or modern deposits of both West and East Antarctica. This lack of correspondence is probably due to preservation biases, but any further significance is hidden by the complex taphonomy of the deposits.

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Section: Methodsmentioning

confidence: 99%

“…Fm = formation. (Modified from Montes et al 2013, with supplementary information from Marenssi et al 2010 and Rocha Campos et al 2017. )…”

Section: Methodsmentioning

confidence: 99%

Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica

Badaró

Petri

2019

Antarctic Science

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Chapter 3.2a Bransfield Strait and James Ross Island: volcanology

Smellie¹

2021

Memoirs

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Following more than 25 years of exploration and research since the last regional appraisal, the number of known subaerially exposed volcanoes in the northern Antarctic Peninsula region has more than trebled, from less than 15 to more than 50, and that total must be increased at least three-fold if seamounts in Bransfield Strait are included. Several volcanoes remain unvisited and there are relatively few detailed studies. The region includes Deception Island, the most prolific active volcano in Antarctica, and Mount Haddington, the largest volcano in Antarctica. The tectonic environment of the volcanism is more variable than elsewhere in Antarctica. Most of the volcanism is related to subduction. It includes very young ensialic marginal basin volcanism (Bransfield Strait), back-arc alkaline volcanism (James Ross Island Volcanic Group) and slab-window-related volcanism (seamount offshore of Anvers Island), as well as volcanism of uncertain origin (Anvers and Brabant islands; small volcanic centres on Livingston and Greenwich islands). Only ‘normal’ arc volcanism is not clearly represented, possibly because active subduction virtually ceased at c. 4 Ma. The eruptive environment for the volcanism varied between subglacial, marine and subaerial but a subglacial setting is prominent, particularly in the James Ross Island Volcanic Group.

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A (tidal-marine) boulder pavement in the late Cenozoic of Seymour Island, West Antarctica: contribution to the palaeogeographical and palaeoclimatic evolution of West Antarctica

Cited by 2 publications

References 16 publications

Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica

Miocene and Plio-Pleistocene foraminiferal assemblages from Seymour Island, Antarctica

Chapter 3.2a Bransfield Strait and James Ross Island: volcanology

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