Late Cenozoic Foraminifera from Diamictites of Cape Lamb, Vega Island, Antarctic Peninsula

Caramés, Andrea; Concheyro, Andrea

doi:10.5710/amgh.7.2.2013.588

Cited by 11 publications

(11 citation statements)

References 48 publications

(48 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Less diverse foraminiferal assemblages have been recorded from Oligo− cene (Gaździcki 1989), Miocene (Birkenmajer and Łuczkowska 1987;Bertels− −Psotka et al 2001;Jonkers et al 2002;Lirio et al 2003;Concheyro et al 2007;Majewski et al 2012;Nývlt et al 2011), Miocene-Pliocene (Adamonis et al 2010 and Pliocene to early Pleistocene exposures (Holland 1910;Gaździcki and Webb 1996;Jonkers et al 2002;Lirio et al 2003;Caramés and Concheyro 2013).…”

Section: Micropaleontological Backgroundmentioning

confidence: 99%

“…In Cape Lamb, Vega Island, glacial deposits are concentrated in three locali− ties: Sandwich Bluff, Leal Bluff and Cape Lamb (Caramés and Concheyro 2013). At Leal Bluff in particular, a megafauna of bivalves (pectinids and mussels) was found in the lower levels of the diamictites that underlie the lowermost pyroclastic deposits of the James Ross Island Volcanic Group (Marenssi et al 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Few contributions about autochthonous and reworked Mesozoic and Cenozoic microbiota from these diamictites have been published (Caramés et al 2008;Concheyro et al 2010;Caramés and Concheyro 2013). For this reason, the objec− tive of this study is to introduce and illustrate new records of calcareous nanno− fossils and the associated foraminifera recovered from diamictite deposits at Sand− wich Bluff and Leal Bluff, Cape Lamb, Vega Island, Antarctica.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nannofossils, foraminifera and microforaminiferal linings in the Cenozoic diamictites of Cape Lamb, Vega Island, Antarctica

Concheyro¹,

Caramés²,

Amenábar³

et al. 2014

Polish Polar Research

Self Cite

View full text Add to dashboard Cite

Micropaleontological and palynological samples from three Cenozoic dia− mictites at Cape Lamb, Vega Island, James Ross Basin were analysed. Fossiliferous sam− ples yielded reworked and autochthonous assemblages of Mesozoic calcareous nanno− fossils, impoverished Cretaceous foraminifera together with Neogene species, as well as Late Cretaceous dinoflagellate cysts, pollen, spores and abundant Cenozoic micro− foraminiferal linings. The recovered nannoflora indicates Early Cretaceous (Hauteri− vian-Albian) and Late Cretaceous (Santonian-Early Campanian) ages, suggesting an in− tensive reworking of marine sediments. The presence of the Early Cretaceous species Nannoconus circularis Deres et Acheriteguy in the diamictite represents its first record for the James Ross Basin. The scarce foraminiferal fauna includes Pullenia jarvisi Cushman, which indicates reworking from lower Maastrichtian-lower Paleocene sedi− ments, and also the Neogene autochthonous Trochammina sp. aff. T. intermedia. The in− ner−organic layer observed inside this specimen appears to be identical to microfora− miniferal linings recovered from the same sample. Palynomorphs found in the studied samples suggest erosion from the underlying Snow Hill Island and the López de Berto− dano Formation beds (upper Campanian-upper Maastrichtian). These recovered assem− blages indicate either different periods of deposition or reworking from diverse sources during Cenozoic glaciation, originating in James Ross Island and the Antarctic Peninsula with the influence of local sediment sources.

show abstract

Section: Micropaleontological Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nannofossils, foraminifera and microforaminiferal linings in the Cenozoic diamictites of Cape Lamb, Vega Island, Antarctica

Concheyro¹,

Caramés²,

Amenábar³

et al. 2014

Polish Polar Research

Self Cite

View full text Add to dashboard Cite

show abstract

“…Relativamente poucas assembleias de foraminíferos foram descritas para os depósitos cenozoicos da Antártica Ocidental, tendo sido relatadas em 11 estudos (i.e., Huber, 1986;Birkenmajer & Luczkowska, 1987;Huber, 1988;Gazdzicki, 1989;Gazdzicki & Webb, 1996;Strong & Webb, 2000;Gazdzicki & Majewski, 2012;Majewski et al, 2012;Caramés & Concheyro, 2013;Concheyro et al, 2014;Majewski & Gazdzicki, 2014 Huber (1986) foi o primeiro a descrever foraminíferos fósseis do Arquipélago James Ross, relatando formas planctônicas para a transição Cretáceo-Paleogeno, registrada na Formação López de Bertodano, e, poucos metros acima, para a Formação Sobral, do Paleoceno, nas ilhas James Ross, Seymour e Vega. Porém, as assembleias de ambas as unidades foram descritas, em sua totalidade e em detalhe, apenas por Huber (1988).…”

Section: Foraminíferos Fósseis Do Cenozoico Da Antártica Ocidentalunclassified

“…Concheyro (2013) relataram assembleias bentônicas, quase exclusivamente calcárias, para diversos níveis de diamictitos da localidade Cape Lamb, na extremidade sul da Ilha Vega. Os táxons mais comuns são os infaunais Globocassidulina biora (Crespin, 1960), Cribroelphidium aff.…”

unclassified

Paleobiologia de foraminíferos e microfósseis associados dos depósitos eocênicos, miocênicos e plio-pleistocênicos da Ilha Seymour, Antártica Ocidental

Badaró¹

View full text Add to dashboard Cite

Western Antarctic deposits, especially those from the Eocene-Oligocene transition, provide important geological data on Cenozoic global climate changes and their impact on the southern biota. Fossil assemblages, including foraminifers, are known from geological units from all Cenozoic epochs, in outcrops of the James Ross and South Shetlands archipelagos. However, the diamictites of Hobbs Glacier (Miocene) and Weddell Sea (Plio-Pleistocene) formations, exposed in James Ross and Seymour islands, were never subjects of micropaleontologic analysis targeting inorganic-walled microfossils. Twelve stratigraphic sections on Seymour Island were analyzed, including the top of the La Meseta Formation (Eocene) and several strata of Hobbs Glacier and Weddell Sea formations. Assemblages of inorganic-walled microfossils, composed mainly of foraminifers, were found for the first time in the La Meseta Formation and in strata from the Hobbs Glacier and Weddell Sea formations. Autochthonous or parautochthonous remains of the foraminifer Textularia sp. were found in the La Meseta Formation, being the first occurrence of the genus in this unit. The best preserved autochthonous or parautochthonous assemblage from Hobbs Glacier Formation is composed of the Lagenid foraminifer Oolina stellula and radiolarian Larcopyle polyacantha. The Rotaliid foraminifer Bolivina sp. is rare and represents an allochthonous elements in this formation. In the Weddell Sea Formation, the best preserved autochthonous or parautochthonous assemblage is composed of the Lagenid foraminifer Favulina hexagona and the planktonic Globigerinita uvula, as well as the Rotaliid foraminifer Globocassidulina subglobosa and the radiolarian L. polyacantha in the same and in other strata. In these Miocene and Plio-Pleistocene deposits also occur large agglutinated foraminifers typical of the deep sea, whose taphonomic features indicate their reelaboration from older deposits, possibly from the Paleocene, given their taphonomic and stratigraphic association with the foraminifer Reticulophragmium garcilassoi, a Paleocene index-fossil. Besides R. garcilassoi, other typical deep-sea taxa occur in the Hobbs Glacier Formation, such as Alveolophragmium orbiculatum, Ammodiscus sp. nov., Ammodiscus pennyi, Ammomarginulina cf. aubertae, Bathysiphon sp. 1, Bathysiphon sp. 2, Cyclammina placenta and Nothia robusta. In the Weddell Sea Formation the agglutinated specimens are represented by Ammodiscus sp. nov., Bathysiphon sp. 1, Budashevaella cf. laevigata, Cyclammina cancellata, Glomospira charoides, Saccammina grzybowski, Sculptobaculites barri and Verneulinoides cf. neocomiensis. Some taxa from Seymour Island also occur in the Paleocene deposits of New Zealand and New Guinea, suggesting some chronological correlation. Although the fossil record of the La Meseta, Hobbs Glacier and Weddell Sea formations is sparse, it was possible to identify autochthonous or parautochthonous remains that indicate the partial composition of the infaunal communities and plankton that thrived in the are...

show abstract

Calcareous nannofossils from the Santa Marta Formation (Upper Cretaceous), northern James Ross Island, Antarctic Peninsula

Guerra

Concheyro

Lees

et al. 2015

Cretaceous Research

Self Cite

View full text Add to dashboard Cite

Late Cenozoic Foraminifera from Diamictites of Cape Lamb, Vega Island, Antarctic Peninsula

Cited by 11 publications

References 48 publications

Nannofossils, foraminifera and microforaminiferal linings in the Cenozoic diamictites of Cape Lamb, Vega Island, Antarctica

Nannofossils, foraminifera and microforaminiferal linings in the Cenozoic diamictites of Cape Lamb, Vega Island, Antarctica

Paleobiologia de foraminíferos e microfósseis associados dos depósitos eocênicos, miocênicos e plio-pleistocênicos da Ilha Seymour, Antártica Ocidental

Calcareous nannofossils from the Santa Marta Formation (Upper Cretaceous), northern James Ross Island, Antarctic Peninsula

Contact Info

Product

Resources

About