Subglacial morphology and glacial evolution of the Palmer deep outlet system, Antarctic Peninsula

Eugene Domack, David Amblàs, Robert Gilbert, Stefanie Brachfeld, Angelo Camerlenghi, Michele Rebesco, Miquel Canals, Roger Urgeles

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

The Palmer Deep is an erosional, inner-shelf trough located at the convergence of ice flow from three distinct accumulation centers. It served as a funnel for ice flow out across the continental shelf of the Antarctic Peninsula. Swath mapping of 1440 km2 of seafloor in and adjacent to the Palmer Deep basin defines a large paleo-ice stream that flowed 230 km across the Antarctic Peninsula continental shelf during the Last Glacial Maximum (MIS-2). The unique perspective and detail of the Palmer Deep physiography allow us to recognize several phases of erosion and deposition in the outlet basin. These events are uniquely constrained by two ODP drill cores (sites 1099 and 1098) that together recovered over 150 m of latest Pleistocene and Holocene sediment. We divide this region of the continental shelf into three zones based upon mega- to meso-scale bathymetric features and emphasize that all three were part of one glacial outlet during the most recent period of glaciation. These zones include from inner shelf to outer shelf: the Palmer Deep basin, the Palmer Deep Outlet Sill and the Hugo Island Trough. Specific seafloor features associated with these zones include: relict terraces, sub-glacial lake deltas, channels and levees, debris slopes, spindle and out bed forms, mega-scale glacial lineations, morainal banks, and bank breach points. The origin of many of these features can be linked to the development of a sub-glacial lake basin within the Palmer Deep during or prior to MIS-2, its subsequent drainage, and recession of the Palmer Deep ice stream system. This sub-glacial lake system is reconstructed at the head of a major paleo-ice stream.

Original languageEnglish
Pages (from-to)125-142
Number of pages18
JournalGeomorphology
Volume75
Issue number1-2 SPEC. ISS.
DOIs
StatePublished - 1 Apr 2006

Fingerprint

glacial lake
ice stream
continental shelf
ice flow
trough
seafloor
basin
bedform
lineation
Ocean Drilling Program
Last Glacial Maximum
sill
terrace
glaciation
Holocene
Pleistocene
drainage
erosion
sediment

Keywords

  • Antarctic Peninsula
  • Ice streams glaciation
  • Palmer Deep
  • Sub-glacial lakes

Cite this

Domack, E., Amblàs, D., Gilbert, R., Brachfeld, S., Camerlenghi, A., Rebesco, M., ... Urgeles, R. (2006). Subglacial morphology and glacial evolution of the Palmer deep outlet system, Antarctic Peninsula. Geomorphology, 75(1-2 SPEC. ISS.), 125-142. https://doi.org/10.1016/j.geomorph.2004.06.013
Domack, Eugene ; Amblàs, David ; Gilbert, Robert ; Brachfeld, Stefanie ; Camerlenghi, Angelo ; Rebesco, Michele ; Canals, Miquel ; Urgeles, Roger. / Subglacial morphology and glacial evolution of the Palmer deep outlet system, Antarctic Peninsula. In: Geomorphology. 2006 ; Vol. 75, No. 1-2 SPEC. ISS. pp. 125-142.
@article{fb2b18a36d1b4091a15c360cb239f8b1,
title = "Subglacial morphology and glacial evolution of the Palmer deep outlet system, Antarctic Peninsula",
abstract = "The Palmer Deep is an erosional, inner-shelf trough located at the convergence of ice flow from three distinct accumulation centers. It served as a funnel for ice flow out across the continental shelf of the Antarctic Peninsula. Swath mapping of 1440 km2 of seafloor in and adjacent to the Palmer Deep basin defines a large paleo-ice stream that flowed 230 km across the Antarctic Peninsula continental shelf during the Last Glacial Maximum (MIS-2). The unique perspective and detail of the Palmer Deep physiography allow us to recognize several phases of erosion and deposition in the outlet basin. These events are uniquely constrained by two ODP drill cores (sites 1099 and 1098) that together recovered over 150 m of latest Pleistocene and Holocene sediment. We divide this region of the continental shelf into three zones based upon mega- to meso-scale bathymetric features and emphasize that all three were part of one glacial outlet during the most recent period of glaciation. These zones include from inner shelf to outer shelf: the Palmer Deep basin, the Palmer Deep Outlet Sill and the Hugo Island Trough. Specific seafloor features associated with these zones include: relict terraces, sub-glacial lake deltas, channels and levees, debris slopes, spindle and out bed forms, mega-scale glacial lineations, morainal banks, and bank breach points. The origin of many of these features can be linked to the development of a sub-glacial lake basin within the Palmer Deep during or prior to MIS-2, its subsequent drainage, and recession of the Palmer Deep ice stream system. This sub-glacial lake system is reconstructed at the head of a major paleo-ice stream.",
keywords = "Antarctic Peninsula, Ice streams glaciation, Palmer Deep, Sub-glacial lakes",
author = "Eugene Domack and David Ambl{\`a}s and Robert Gilbert and Stefanie Brachfeld and Angelo Camerlenghi and Michele Rebesco and Miquel Canals and Roger Urgeles",
year = "2006",
month = "4",
day = "1",
doi = "10.1016/j.geomorph.2004.06.013",
language = "English",
volume = "75",
pages = "125--142",
journal = "Geomorphology",
issn = "0169-555X",
publisher = "Elsevier",
number = "1-2 SPEC. ISS.",

}

Domack, E, Amblàs, D, Gilbert, R, Brachfeld, S, Camerlenghi, A, Rebesco, M, Canals, M & Urgeles, R 2006, 'Subglacial morphology and glacial evolution of the Palmer deep outlet system, Antarctic Peninsula', Geomorphology, vol. 75, no. 1-2 SPEC. ISS., pp. 125-142. https://doi.org/10.1016/j.geomorph.2004.06.013

Subglacial morphology and glacial evolution of the Palmer deep outlet system, Antarctic Peninsula. / Domack, Eugene; Amblàs, David; Gilbert, Robert; Brachfeld, Stefanie; Camerlenghi, Angelo; Rebesco, Michele; Canals, Miquel; Urgeles, Roger.

In: Geomorphology, Vol. 75, No. 1-2 SPEC. ISS., 01.04.2006, p. 125-142.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Subglacial morphology and glacial evolution of the Palmer deep outlet system, Antarctic Peninsula

AU - Domack, Eugene

AU - Amblàs, David

AU - Gilbert, Robert

AU - Brachfeld, Stefanie

AU - Camerlenghi, Angelo

AU - Rebesco, Michele

AU - Canals, Miquel

AU - Urgeles, Roger

PY - 2006/4/1

Y1 - 2006/4/1

N2 - The Palmer Deep is an erosional, inner-shelf trough located at the convergence of ice flow from three distinct accumulation centers. It served as a funnel for ice flow out across the continental shelf of the Antarctic Peninsula. Swath mapping of 1440 km2 of seafloor in and adjacent to the Palmer Deep basin defines a large paleo-ice stream that flowed 230 km across the Antarctic Peninsula continental shelf during the Last Glacial Maximum (MIS-2). The unique perspective and detail of the Palmer Deep physiography allow us to recognize several phases of erosion and deposition in the outlet basin. These events are uniquely constrained by two ODP drill cores (sites 1099 and 1098) that together recovered over 150 m of latest Pleistocene and Holocene sediment. We divide this region of the continental shelf into three zones based upon mega- to meso-scale bathymetric features and emphasize that all three were part of one glacial outlet during the most recent period of glaciation. These zones include from inner shelf to outer shelf: the Palmer Deep basin, the Palmer Deep Outlet Sill and the Hugo Island Trough. Specific seafloor features associated with these zones include: relict terraces, sub-glacial lake deltas, channels and levees, debris slopes, spindle and out bed forms, mega-scale glacial lineations, morainal banks, and bank breach points. The origin of many of these features can be linked to the development of a sub-glacial lake basin within the Palmer Deep during or prior to MIS-2, its subsequent drainage, and recession of the Palmer Deep ice stream system. This sub-glacial lake system is reconstructed at the head of a major paleo-ice stream.

AB - The Palmer Deep is an erosional, inner-shelf trough located at the convergence of ice flow from three distinct accumulation centers. It served as a funnel for ice flow out across the continental shelf of the Antarctic Peninsula. Swath mapping of 1440 km2 of seafloor in and adjacent to the Palmer Deep basin defines a large paleo-ice stream that flowed 230 km across the Antarctic Peninsula continental shelf during the Last Glacial Maximum (MIS-2). The unique perspective and detail of the Palmer Deep physiography allow us to recognize several phases of erosion and deposition in the outlet basin. These events are uniquely constrained by two ODP drill cores (sites 1099 and 1098) that together recovered over 150 m of latest Pleistocene and Holocene sediment. We divide this region of the continental shelf into three zones based upon mega- to meso-scale bathymetric features and emphasize that all three were part of one glacial outlet during the most recent period of glaciation. These zones include from inner shelf to outer shelf: the Palmer Deep basin, the Palmer Deep Outlet Sill and the Hugo Island Trough. Specific seafloor features associated with these zones include: relict terraces, sub-glacial lake deltas, channels and levees, debris slopes, spindle and out bed forms, mega-scale glacial lineations, morainal banks, and bank breach points. The origin of many of these features can be linked to the development of a sub-glacial lake basin within the Palmer Deep during or prior to MIS-2, its subsequent drainage, and recession of the Palmer Deep ice stream system. This sub-glacial lake system is reconstructed at the head of a major paleo-ice stream.

KW - Antarctic Peninsula

KW - Ice streams glaciation

KW - Palmer Deep

KW - Sub-glacial lakes

UR - http://www.scopus.com/inward/record.url?scp=33645862874&partnerID=8YFLogxK

U2 - 10.1016/j.geomorph.2004.06.013

DO - 10.1016/j.geomorph.2004.06.013

M3 - Article

AN - SCOPUS:33645862874

VL - 75

SP - 125

EP - 142

JO - Geomorphology

JF - Geomorphology

SN - 0169-555X

IS - 1-2 SPEC. ISS.

ER -