Lithostratigraphy of the Cretaceous Strata of West James Ross Island, Antarctica

Ineson, Jon R.; Crame, J. Alistair; Thomson, M.R.A.

doi:10.1016/0195-6671(86)90014-5

Cited by 104 publications

(97 citation statements)

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“…Bohemian and Algal Streams catchments (Figure 2) lie mostly on Cretaceous marine sediments of James Ross Basin (Del Valle et al, 1992) with upper reaches lying on Neogene volcanic rocks of James Ross Island Volcanic Group (Nelson, 1975;Smellie et al, 2013) and Mendel Formation sediments (Nývlt et al, 2011). Cretaceous strata present in Bohemian Stream catchment are generally made of conglomerates and pebbly to silty sandstones (Ineson et al, 1986;Olivero et al, 1986;Whitham et al, 2006), while fine-grained sandstones and mudstones are more common in Algal Stream catchment (Olivero et al, 1986;Pirrie, 1989;Crame et al, 1991). James Ross Island Volcanic Group rocks cropping out in the studied catchments are represented by hyaloclastite breccia, subaerial basalt caprocks, dolerite dykes (Košler et al, 2009); hyaloclastite tuffs, volcanic ash, lapillistone and volcaniclastic sandstones to conglomerates are associated with Bibby Hill and crop out in the upper part of Bohemian Stream catchment only (Nehyba and Nývlt, 2014;Mlčoch et al, 2016), while the interbedded siliciclastic to volcaniclastic siltstones, diamictites and conglomerates are associated with the Lachman Crags-Berry Hill volcaniclastic delta and they crop out only in the upper part of Algal Stream catchment (Nehyba and Nývlt, 2015;Mlčoch et al, 2016).…”

Section: Study Areamentioning

confidence: 99%

Seasonal hydrological and suspended sediment transport dynamics in proglacial streams, James Ross Island, Antarctica

Kavan

Ondruch

Nývlt

et al. 2016

Geografiska Annaler: Series A, Physical Geography

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Rapid warming of the Antarctic Peninsula is producing accelerated glacier mass loss and can be expected to have significant impacts on meltwater runoff regimes and proglacial fluvial activity. This study presents analysis of the hydrology and suspended sediment dynamics of two proglacial streams on James Ross Island, Antarctic Peninsula. Mean water discharge during 8/1/2015 to 18/2/2015 reached 0.19 m 3 s -1 and 0.06 m 3 s -1 for Bohemian Stream and Algal Stream, respectively, equivalent to specific runoff of 76 mm month -1 and 60 mm month -1 . The daily discharge regime strongly correlated with air and ground temperatures. The effect of global radiation on proglacial water discharge was found low to negligible. Suspended sediment concentrations of Bohemian Stream were very high (up to 2927 mg L -1 ) due to aeolian supply and due to the high erodibility of local rocks. Total sediment yield (186 t km -2 yr -1 ) was high for (nearly) deglaciated catchments, but relatively low in comparison with streams draining more glaciated alpine and arctic catchments. The sediment provenance was mostly local Cretaceous marine and aeolian sediments; volcanic rocks are not an important source for suspended load. High Rb/Sr ratios for some samples suggested chemical weathering. Overall, this monitoring of proglacial hydrological and suspended sediment dynamics contributes to the dearth of such data from Antarctic environments and offers an insight to the nature of the proglacial fluvial activity, which is likely to be in a transient state with ongoing climate change.

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Section: Study Areamentioning

confidence: 99%

Seasonal hydrological and suspended sediment transport dynamics in proglacial streams, James Ross Island, Antarctica

Kavan

Ondruch

Nývlt

et al. 2016

Geografiska Annaler: Series A, Physical Geography

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“…O Grupo Gustav foi subdividido em cinco formações (Ineson et al, 1986), viz., Pedersen, Lagrelius Point, Kotick Point, Whisky Bay e Hidden Lake (Figura 2). A Formação Pedersen, constituída por ruditos e arenitos depositados em ambientes de leques submarinos, não ocorre na Ilha James Ross.…”

Section: Contexto Geológico E Estratigrafiaunclassified

“…A Formação Whisky Bay, com uma espessura de até 950 m, mostra forte variação lateral de fácies e predomínio de ruditos depositados em ambiente de leques submarinos. Na região norte da Ilha James Ross, entre a Baía Whisky e o Bibby Point, Ineson et al (1986) subdividiram a esta unidade em três membros (Figura 2): o Membro Bibby Point, com cerca de 80 m de espessura, compreende arenitos siltosos fortemente bioturbados com intercalações lenticulares de brechas. O Membro Lewis Hill, com 400-500 m de espessura, compreende conglomerados gradados canalizados e arenitos seixosos.…”

Section: Contexto Geológico E Estratigrafiaunclassified

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Inferências paleoambientais a partir de análise de palinofácies da Formação Hidden Lake (Coniaciano, Cretáceo), Bacia Larsen, Ilha James Ross, Antártica

Crud

Carvalho

Ramos

2017

Rev. bras. paleontol.

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-PALEOENVIRONMENTAL INFERENCES FROM PALYNOFACIES ANALYSIS OF HIDDEN LAKE FORMATION (CONIACIAN, CRETACEOUS), LARSEN BASIN, JAMES ROSS ISLAND, ANTARCTICA. The James RossSub-basin has one of the most complete sedimentary sequences deposited in the Southern Hemisphere. This work aims to characterize the sedimentary organic matter of 32 samples recovered from HL-1 (64 m) and HL-2 (59 m) sections, assigned to Hidden Lake Formation (Coniacian), thus to identify the paleoenvironmental changes. The Amorphous, Phytoclasts and Palynomorphs groups were identified. The sedimentary organic matter was grouped into amorphous material, opaque phytoclasts, non-opaque phytoclasts, continental palynomorphs and marine palynomorphs. The stratigraphic distribution of the groups revealed three intervals (I-III) for HL-1 section and four for HL-2 (A-D). The paleoenvironmental changes were supported based on facies association (AF-1-AF3), continental/marine ratio and principal components analysis. The two sections were correlated as follow: I/A, II/B and III-C-D. The Interval I/A is characterized by high values of woody material. The Interval II/B continues with high values of woody material; however, the highest peak of amorphous organic matter is recorded in HL-1 section, and the lowest abundance of non-opaque in the HL-2. In the III/C-D is recorded a conspicuous increase in marine elements in both sections. A fan-delta paleoenvironment is suggested for both sections. In section HL-1, a large amount of phytoclasts and volcanoclastic detritus suggests more proximal position in the sedimentary body. In the HL-2 section, a large amount of marine elements suggests normal marine removed from active terrigenous inputs.Key words: palynofacies, Hidden Lake Formation, Coniacian, Antarctic Peninsula.RESUMO -A Sub-bacia James Ross destaca-se por possuir uma das mais completas sequências sedimentares depositadas no Hemisfério Sul. Este estudo tem por objetivo a caracterização da matéria orgânica sedimentar (MOS) de 32 amostras recuperadas das seções HL-1 (64 m) e HL-2 (59 m) atribuídas à Formação Hidden Lake (Coniaciano), com a finalidade de identificar mudanças paleoambientais. Os grupos Amorfo, Fitoclastos e Palinomorfos foram encontrados. A matéria orgânica sedimentar foi agrupada em: material amorfo, fitoclastos opacos, fitoclastos não opacos, palinomorfos continentais e palinomorfos marinhos. A distribuição estratigráfica dos grupos revelou três intervalos (I-III) na seção HL-1 e quatro na seção HL-2 (A-D). As mudanças paleoambientais foram sugeridas com base na correlação entre as seções, com auxílio das associações de fácies (AF-1-AF3), razão continental/ marinho (C/M) e análise de componentes principais. As duas seções podem ser correlacionadas da seguinte forma: I/A, II/B e III/C-D. O Intervalo I/A é caracterizado por altos valores de material lenhoso. O Intervalo II/B continua com valores altos de material lenhoso; no entanto, é marcado pelo maior pico de matéria orgânica amorfa na seção HL-1 e menor abundância de fitoclastos nã...

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“…Over 5 km thick succession of deposits of the James Ross Basin (back−arc ba− sin) of Aptian to Eocene/Oligocene clastic sedimentary rocks represents the oldest rocks cropping on the James Ross Island (Ineson et al 1986;Crame et al 1991;Pirrie et al 1997;Francis et al 2006).…”

Section: Geological Settingmentioning

confidence: 99%

“Bottomsets” of the lava−fed delta of James Ross Island Volcanic Group, Ulu Peninsula, James Ross Island, Antarctica

Nehyba¹,

Nývlt²

2015

Polish Polar Research

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Sedimentological study of the three geographically separated outcrops of bottom− sets of a single lava−fed delta (Pliocene) in the James Ross Island (Antarctica) allows recogni− tion of six lithofacies. Deposits of traction currents, deposits of volcaniclastic debris flows and products of such flows transformations (both low− and high−density turbidity currents) and glacigenic deposits (subaqueous debris flows and traction/turbidity currents) were all recog− nised. Existence of submarine proglacial environment formed prior to formation of volcani− clastic deposits partly covering the subaqueous slopes of volcano is supposed. The principal role of mass flow processes was recognised and explained by relative steep slopes of the lava−fed delta. The distribution of lithofacies significantly differs in the individual outcrops. These variations in sedimentary succession and also in thickness of volcaniclastic deposits of "bottomsets" of the single lava fed delta suggest principal role of local conditions and paleogeography for development and preservation of this part of delta depositional system. Moreover proximal and distal setting can be followed and direct vs. more distant relation to over−riding lava−fed delta supposed. The sedimentary succession terminated by foresets of hyaloclastite breccia.

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Lithostratigraphy of the Cretaceous Strata of West James Ross Island, Antarctica

Cited by 104 publications

References 3 publications

Seasonal hydrological and suspended sediment transport dynamics in proglacial streams, James Ross Island, Antarctica

Seasonal hydrological and suspended sediment transport dynamics in proglacial streams, James Ross Island, Antarctica

Inferências paleoambientais a partir de análise de palinofácies da Formação Hidden Lake (Coniaciano, Cretáceo), Bacia Larsen, Ilha James Ross, Antártica

“Bottomsets” of the lava−fed delta of James Ross Island Volcanic Group, Ulu Peninsula, James Ross Island, Antarctica

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