Records of Holocene Environmental Changes in Terrestrial Sedimentary Deposits on King George Island, Antarctica; A Critical Review

Tatur, Andrzej; Valle, Rodolfo del; Barczuk, Andrzej; Martinez-Macchiavello, J.C.

doi:10.4217/opr.2004.26.3.531

Cited by 17 publications

(18 citation statements)

References 8 publications

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“…The sand values varied from 66.53 to 97.44 %, whereas silt values varied from 0 to 22.83 % and clay values varied from 0 to 3.13 % (Fig.4). The lower part of the core consists of large amount of sand with very less amount of silt and clay which corresponds to fluvioglacial deposit formed, before ~6 cal ka BP, as reported by studies conducted by others (Tatur et al 2004;Yoon et al 2006). …”

Section: Introductionsupporting

confidence: 62%

Holocene Climate Variability from Lake Sediment Core in Larsemann Hills, Antarctica

Govil

Mazumder

Tiwari

et al. 2011

Journal of the Geological Society of India

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A sediment core (L2) from Larsemann Hills, Antarctica was analyzed for Biogenic Silica (BSi), Sand (%) and Total Organic Carbon (TOC). The 78 cm core length represents the time span of ~8.3 cal ka BP. The values of BSi from the core show prominent high productivity from ~8.3 to ~6 cal ka BP in comparison to less productivity in mid-late Holocene (~6 cal ka BP to recent). Moreover, high sand (%) infers the glacio-fluvial deposition from ~8.3 to ~5 cal ka BP TOC shows little variation through out the core, except in the upper ~10 cm (~4 cal ka BP) part wherein it is comparatively high. The increased TOC in the upper part of the core possibly indicates presence of algal mat due to exposure of the lake to the ice free (glacier free) conditions.

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Section: Introductionsupporting

confidence: 62%

Holocene Climate Variability from Lake Sediment Core in Larsemann Hills, Antarctica

Govil

Mazumder

Tiwari

et al. 2011

Journal of the Geological Society of India

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“…In the northern AP region, a number of volcanoes are situated along and parallel to the rifting axis of Bransfield Strait (Tatur et al . 1999). These Quaternary volcanic rocks are mainly basalts and more rarely andesites, compositionally similar to other back-arc basin basalts (Keller et al .…”

Section: Discussionmentioning

confidence: 99%

Chronostratigraphy of the sedimentary record of Limnopolar Lake, Byers Peninsula, Livingston Island, Antarctica

Toro

Granados²,

Pla³

et al. 2013

Antarctic Science

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Abstract:The chronostratigraphy of the sedimentary record of Limnopolar Lake, located on Byers Peninsula (Livingston Island, South Shetland Islands, Maritime Antarctica), is described based on radionuclides and radiocarbon age dating. The oldest moss macrofossil age was 6700 ± 50 yr BP (7510 ± 80 cal yr BP) from which the age/depth model estimates a basal age for the sedimentary record of c. 8300 cal yr BP, suggesting an earlier deglaciation of Byers Peninsula than reported in previous studies. Lithological units and other stratigraphic zones are described throughout the sediment core, showing different mineralogical composition and a fine alternation of clays and silty clays and moss layers of Drepanocladus longifolius. Based on magnetic susceptibility analyses, a number of probable primary and reworked tephra layers were identified, seven of them confirmed by SEM observations, and most of them in agreement with the regional tephrachronology stratigraphy for the north-west Antarctic Peninsula. Sedimentation rates showed no significant changes during the last 5000 years with the exception of an abrupt event that took place around 5400 cal yr BP, which implied the sedimentation of c. 30 cm of clays in a very short time, probably related to a period of glacial re-advance that caused abrupt changes in geomorphological processes in the catchment.

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“…Various hypotheses have also been previously proposed to explain the distributional patterns and the origin of Antarctic mosses, most of which favour the concept of Holocene immigration by long-distance dispersal of diasporas by wind (Muñoz et al 2004, Van der Putten et al 2010. Moss peat accumulations on King George Island have revealed that the peat banks were formed after mid-Holocene tephra fallout, which was a period dated between 3.8 and 5.0 kyr BP (Birkenmajer et al 1985, Tatur et al 2004. The current study, however, suggests that the moss flora at Schirmacher Oasis existed much earlier, around 10.65 kyr BP.…”

Section: Discussionmentioning

confidence: 99%

“…1985, Tatur et al . 2004). The current study, however, suggests that the moss flora at Schirmacher Oasis existed much earlier, around 10.65 kyr bp .…”

Section: Discussionmentioning

confidence: 99%

A Holocene moss species preserved in lake sediment core and the present moss diversity at Schirmacher Oasis, Antarctica

Singh

Ochyra²,

Pednekar

et al. 2012

Antarctic Science

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Abstract:The sub-fossil moss Pohlia nutans is recorded from lake sediment cores at Schirmacher Oasis, Dronning Maud Land, Antarctica. It was isolated from 160-162 cm depth of a sediment core. Radiocarbon ( 14 C) dates by accelerator mass spectrometry confirmed its age to be 10.65 kyr BP. The preserved Holocene sub-fossil moss includes delicate leaves, axes and rhizoids and matches perfectly the extant specimens of P. nutans. This is the first record of this sub-fossil from Dronning Maud Land, although the species is common as present-day flora in other parts of the Antarctic. The present status of the moss flora of Schirmacher Oasis is also discussed, including its diversity, ecology and biogeography.

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Records of Holocene Environmental Changes in Terrestrial Sedimentary Deposits on King George Island, Antarctica; A Critical Review

Cited by 17 publications

References 8 publications

Holocene Climate Variability from Lake Sediment Core in Larsemann Hills, Antarctica

Holocene Climate Variability from Lake Sediment Core in Larsemann Hills, Antarctica

Chronostratigraphy of the sedimentary record of Limnopolar Lake, Byers Peninsula, Livingston Island, Antarctica

A Holocene moss species preserved in lake sediment core and the present moss diversity at Schirmacher Oasis, Antarctica

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