Occurrences and the formation timing of the marine platforms and scarps and beach gravels developed in the vicinity of King Sejong Station, Barton Peninsula, King George Island, South Shetland Islands, West Antarctica

2017 ◽  
Vol 53 (4) ◽  
pp. 609-617
Author(s):  
Soon-Keun Chang
Keyword(s):  
South Shetland Islands ◽  
King George Island ◽  
West Antarctica ◽  
Shetland Islands ◽  
Barton Peninsula

scholarly journals The deglaciation of Barton Peninsula (King George Island, South Shetland Islands, Antarctica) based on geomorphological evidence and lacustrine records

Polar Record ◽  
2019 ◽  
Vol 55 (3) ◽  
pp. 177-188 ◽  
Author(s):  
Marc Oliva ◽  
Dermot Antoniades ◽  
Enrique Serrano ◽  
Santiago Giralt ◽  
Emma J. Liu ◽  
...  
Keyword(s):  
Lake Sediments ◽  
Environmental Changes ◽  
Lacustrine Sediments ◽  
South Shetland Islands ◽  
King George Island ◽  
Glacial Retreat ◽  
Radiocarbon Dates ◽  
Shetland Islands ◽  
Ice Cap ◽  
Barton Peninsula

AbstractBarton Peninsula is an ice-free area located in the southwest corner of King George Island (South Shetland Islands, Antarctica). Following the Last Glacial Maximum, several geomorphological features developed in newly exposed ice-free terrain and their distribution provide insights about past environmental evolution of the area. Three moraine systems are indicative of three main glacial phases within the long-term glacial retreat, which also favoured the development of numerous lakes. Five of these lakes were cored to understand in greater detail the pattern of deglaciation through the study of lacustrine records. Radiocarbon dates from basal lacustrine sediments enabled the reconstruction of the chronology of Holocene glacial retreat. Tephra layers present in lake sediments provided additional independent age constraints on environmental changes based on geochemical and geochronological correlation with Deception Island-derived tephra. Shrinking of the Collins Glacier exposed the southern coastal fringe of Barton Peninsula at 8 cal ky BP. After a period of relative stability during the mid-Holocene, the ice cap started retreating northwards after 3.7 cal ky BP, confining some glaciers within valleys as shown by moraine systems. Lake sediments confirm a period of relative glacial stability during the last 2.4 cal ky BP.

scholarly journals Morphology and variations of glacial drainage basins in the King George Island ice field, Antarctica

1999 ◽  
Vol 29 ◽  
pp. 220-224 ◽  
Author(s):  
Jefferson C. Simões ◽  
Ulisses F. Bremer ◽  
Francisco E. Aquino ◽  
Francisco A. Ferron
Keyword(s):  
South Shetland Islands ◽  
Field Observations ◽  
Multispectral Imagery ◽  
King George Island ◽  
West Antarctica ◽  
Drainage Basins ◽  
Shetland Islands ◽  
Radio Echo Sounding ◽  
Ice Field ◽  
Glacial Cover

AbstractA Système probatoire pour l’observation de la terre (SPOT) mosaic of King George Island, the largest (1250 Km2) of the South Shetland Islands, West Antarctica, shows its major morphological features. Three main ice domes and 70 glacier drainage basins, covering 92.7% of the King George Island area, strongly controlled by the subglacial morphology and drained by relatively fast-moving tidewater outlet glaciers, were delineated. A general retreat of ice fronts through four decades, more intensely on the eastern side of the island (to the Bransfield Strait), resulted in the loss of about 7% of the glacial cover area. Superficial snow fades were derived from SPOT multispectral imagery and, together with field observations, allowed the transient-snowline elevation to be obtained The latter is estimated to have risen from about 200-250 m in the mid-1950s to 300-350 m by 1988. Spot radio-echo sounding surveys give an overview of the bedrock morphology.

A new aspidostomatid bryozoan from the Cape Melville Formation (Lower Miocene) of King George Island, West Antarctica

2004 ◽  
Vol 16 (3) ◽  
pp. 319-327 ◽  
Author(s):  
URSZULA HARA ◽  
J. ALISTAIR CRAME
Keyword(s):  
New Species ◽  
Colony Growth ◽  
Morphological Characters ◽  
South Shetland Islands ◽  
King George Island ◽  
West Antarctica ◽  
Shetland Islands ◽  
Sedimentary Sequences ◽  
Early Neogene ◽  
A New Species

Fragments of large, bilamellar aspidostomatid bryozoan colonies occur in Early Miocene glaciomarine sedimentary sequences of the Cape Melville Formation, King George Island, South Shetland Islands, West Antarctica. Investigation of the morphological characters of this aspidostomatid cheilostome shows that it represents a new species, which is described herein as Aspidostoma melvillensis sp. n. A combination of the colony-growth pattern, inferred co-occurring biota and associated sedimentary structures indicates a comparatively deep-water, outer shelf palaeoenvironmental setting. This Miocene occurrence of Aspidostoma melvillensis sp.n. emphasizes a biogeographical link with adjacent Southern Hemisphere regions during the early Neogene.

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