Reconstructing the configuration of the British/Irish Ice Sheet off the north west coast of Ireland

Rachael Shannon, P Dunlop

Research output: Contribution to conferenceAbstract

Abstract

Evidence from the terrestrial glacial record indicates that the limits of the last British/Irish Ice Sheet must have extended far out onto the continental shelf in the Northwest of Ireland. Data from the Irish National Seabed Survey (INSS) provides the first real opportunity to investigate this hypothesis in detail. This study utilised INSS multibeam swath bathymetry imagery along with backscatter and acoustic sub-bottom data sets to investigate the glacial record on the continental shelf off the North West coast of Ireland. The main objective was to determine whether the last British/Irish ice sheet occupied the shelf, and if so, to reconstruct its configuration and extent. The results show a complex seafloor morphology comprising of both relict and modern bedforms and we present the first evidence of former glaciation in the region. A range of submerged glacial landforms and sediments are evident that are most likely associated with a Scottish ice mass that invaded this portion of the continental shelf. The configuration of landforms close to the shelf edge suggests that ice extended as far as this and then rapidly ablated. The results provide the first evidence of at least one widespread shelf glaciation in the area and constrain ice sheet
extent in this region.

Conference

ConferenceIrish Quaternary Association
Abbreviated titleIQUA
CountryIreland
CityMaynooth
Period31/03/0731/03/07

Fingerprint

ice sheet
continental shelf
ice
glaciation
coast
swath bathymetry
glacial landform
bedform
glacial deposit
shelf break
backscatter
landform
imagery
acoustics
seafloor

Cite this

Shannon, R., & Dunlop, P. (2007). Reconstructing the configuration of the British/Irish Ice Sheet off the north west coast of Ireland. Abstract from Irish Quaternary Association, Maynooth, Ireland.
Shannon, Rachael ; Dunlop, P. / Reconstructing the configuration of the British/Irish Ice Sheet off the north west coast of Ireland. Abstract from Irish Quaternary Association, Maynooth, Ireland.1 p.
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title = "Reconstructing the configuration of the British/Irish Ice Sheet off the north west coast of Ireland",
abstract = "Evidence from the terrestrial glacial record indicates that the limits of the last British/Irish Ice Sheet must have extended far out onto the continental shelf in the Northwest of Ireland. Data from the Irish National Seabed Survey (INSS) provides the first real opportunity to investigate this hypothesis in detail. This study utilised INSS multibeam swath bathymetry imagery along with backscatter and acoustic sub-bottom data sets to investigate the glacial record on the continental shelf off the North West coast of Ireland. The main objective was to determine whether the last British/Irish ice sheet occupied the shelf, and if so, to reconstruct its configuration and extent. The results show a complex seafloor morphology comprising of both relict and modern bedforms and we present the first evidence of former glaciation in the region. A range of submerged glacial landforms and sediments are evident that are most likely associated with a Scottish ice mass that invaded this portion of the continental shelf. The configuration of landforms close to the shelf edge suggests that ice extended as far as this and then rapidly ablated. The results provide the first evidence of at least one widespread shelf glaciation in the area and constrain ice sheetextent in this region.",
author = "Rachael Shannon and P Dunlop",
note = "talk; Irish Quaternary Association : Spring Meeting, IQUA ; Conference date: 31-03-2007 Through 31-03-2007",
year = "2007",
month = "3",
day = "31",
language = "English",

}

Shannon, R & Dunlop, P 2007, 'Reconstructing the configuration of the British/Irish Ice Sheet off the north west coast of Ireland' Irish Quaternary Association, Maynooth, Ireland, 31/03/07 - 31/03/07, .

Reconstructing the configuration of the British/Irish Ice Sheet off the north west coast of Ireland. / Shannon, Rachael; Dunlop, P.

2007. Abstract from Irish Quaternary Association, Maynooth, Ireland.

Research output: Contribution to conferenceAbstract

TY - CONF

T1 - Reconstructing the configuration of the British/Irish Ice Sheet off the north west coast of Ireland

AU - Shannon, Rachael

AU - Dunlop, P

N1 - talk

PY - 2007/3/31

Y1 - 2007/3/31

N2 - Evidence from the terrestrial glacial record indicates that the limits of the last British/Irish Ice Sheet must have extended far out onto the continental shelf in the Northwest of Ireland. Data from the Irish National Seabed Survey (INSS) provides the first real opportunity to investigate this hypothesis in detail. This study utilised INSS multibeam swath bathymetry imagery along with backscatter and acoustic sub-bottom data sets to investigate the glacial record on the continental shelf off the North West coast of Ireland. The main objective was to determine whether the last British/Irish ice sheet occupied the shelf, and if so, to reconstruct its configuration and extent. The results show a complex seafloor morphology comprising of both relict and modern bedforms and we present the first evidence of former glaciation in the region. A range of submerged glacial landforms and sediments are evident that are most likely associated with a Scottish ice mass that invaded this portion of the continental shelf. The configuration of landforms close to the shelf edge suggests that ice extended as far as this and then rapidly ablated. The results provide the first evidence of at least one widespread shelf glaciation in the area and constrain ice sheetextent in this region.

AB - Evidence from the terrestrial glacial record indicates that the limits of the last British/Irish Ice Sheet must have extended far out onto the continental shelf in the Northwest of Ireland. Data from the Irish National Seabed Survey (INSS) provides the first real opportunity to investigate this hypothesis in detail. This study utilised INSS multibeam swath bathymetry imagery along with backscatter and acoustic sub-bottom data sets to investigate the glacial record on the continental shelf off the North West coast of Ireland. The main objective was to determine whether the last British/Irish ice sheet occupied the shelf, and if so, to reconstruct its configuration and extent. The results show a complex seafloor morphology comprising of both relict and modern bedforms and we present the first evidence of former glaciation in the region. A range of submerged glacial landforms and sediments are evident that are most likely associated with a Scottish ice mass that invaded this portion of the continental shelf. The configuration of landforms close to the shelf edge suggests that ice extended as far as this and then rapidly ablated. The results provide the first evidence of at least one widespread shelf glaciation in the area and constrain ice sheetextent in this region.

M3 - Abstract

ER -

Shannon R, Dunlop P. Reconstructing the configuration of the British/Irish Ice Sheet off the north west coast of Ireland. 2007. Abstract from Irish Quaternary Association, Maynooth, Ireland.