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

Bibliographic Data

ID9225366
AuthorsMartin Oliva (0000-0001-6521-6388, Universitat de Barcelona, corresponding author), Dermot Antoniades (0000-0001-6629-4839, Center for Northern Studies), Enrique Serrano (0000-0001-9760-3876, Universidad de Valladolid), Santiago Giralt (0000-0001-8570-7838, Geociencias Barcelona), Emma J Liu, Emma Liu (0000-0003-4525-2060, University of Cambridge), Ignacio Granados (0000-0002-8669-6613, Agencia de Evaluación de Tecnologías Sanitarias), Sergi Pla‐rabè (0000-0003-3532-9466, Centre for Research on Ecology and Forestry Applications), Sergi Pla-Rabes, Manuel Toro (0009-0006-9867-6712, Centro de Estudios y Experimentación de Obras Públicas), Soon Gyu Hong (0000-0002-8463-948X, Korea Polar Research Institute), Gonçalo Vieira (0000-0002-4416-757X)
Year2019
Volume55
Issue3
Pages177-188
Publication date2019-05-01
Peer ReviewedYes
Open AccessYes
TypeARTICLE
VenuePolar Record (JOURNAL)
Journal identifiersISSN: 0032-2474 • E-ISSN: 1475-3057
PublisherCambridge University Press (CUP) (PUBLISHER)
DOI10.1017/s0032247419000469
OpenAlexW2971391316
LanguageEN
Citations received4
References cited53

Barton 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

Archaeology · Deglaciation · Geography · Geomorphology · Glacial period · Glacier · Holocene · Moraine · Peninsula · Physical geography · Radiocarbon dating · Shetland · Tephra · Cryospheric studies and observations · Geology · Geology and Paleoclimatology Research · Oceanography · Paleontology · Polar Research and Ecology

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