47 ground-penetrating radar lines of Area 4 - Gravel spit system from Potter Cove, King George Island, Antarctic Peninsula

Sedimentary architecture and morphogenetic evolution of a polar bay‐mouth gravel‐spit system are revealed based on topographic mapping, sedimentological data, radiocarbon dating and ground‐penetrating radar investigations. Data document variable rates of spit progradation in reaction to atmospheric...

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Bibliographic Details
Main Authors: Lindhorst, Sebastian, Schutter, Ilona
Format: Dataset
Language:English
Published: PANGAEA 2018
Subjects:
Date/Time of event
Date/Time of event 2
Event label
File name
Frequency
Latitude of event
Latitude of event 2
Longitude of event
Longitude of event 2
Maxwell Bay
King George Island
Antarctic Peninsula
PB-001
PB-002
PB-003
PB-004
PB-005
PB-006
PB-007
PB-008
PB-009
PB-010
PB-011
PB-012
PB-013
PB-014
PB-015
PB-016
PB-017
PB-018
PB-019
PB-020
PB-021
PB-022
PB-023
PB-024
PB-025
PB-083
PB-084
PB-085
PB-086
PB-152
PB-153
PB-154
PB-155
PB-156
PB-157
PB-158
PB-159
PB-160
Antarctic
Potter Cove
Antarc*
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.825658
https://doi.org/10.1594/PANGAEA.825658
Description
Summary:Sedimentary architecture and morphogenetic evolution of a polar bay‐mouth gravel‐spit system are revealed based on topographic mapping, sedimentological data, radiocarbon dating and ground‐penetrating radar investigations. Data document variable rates of spit progradation in reaction to atmospheric warming synchronous to the termination of the last glacial re‐advance (LGR, 0.45‐0.25 ka BP), the southern hemisphere equivalent of the Little Ice Age cooling period. Results show an interruption of spit progradation that coincides with the proposed onset of accelerated isostatic rebound in reaction to glacier retreat. Spit growth resumed in the late 19th century after the rate of isostatic rebound decreased, and continues until today. The direction of modern spit progradation, however, is rotated northwards compared to the growth axis of the early post‐LGR spit. This is interpreted to reflect the shift and strengthening in the regional wind field during the last century. A new concept for the interplay of polar gravel‐spit progradation and glacio‐isostatic adjustment is presented, allowing for the prediction of future coastal evolution in comparable polar settings.

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