Seasonal controls on deposition of Late Devensian glaciolacustrine sediments, Central ireland: Implications for the construction of a varve chronology for the British-Irish ice sheet
Laminated pro-glacial glaciolacustrine sediments dating from the Late Devensian (22-10,000 bp) from central Ireland were examined using a combination of detailed logging and scanning electron microscope surface texture and fabric analyses. The sediments are rhythmically laminated and consist of coar...
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ftmanchuniv:oai:e-space.mmu.ac.uk:596735 2023-05-15T16:40:57+02:00 Seasonal controls on deposition of Late Devensian glaciolacustrine sediments, Central ireland: Implications for the construction of a varve chronology for the British-Irish ice sheet Delaney, CA Hambrey, MJ Christoffersen, P Glasser, NF Hubbard, B 2009-03-05 text https://e-space.mmu.ac.uk/596735/2/Delaney%20C%202009%20Final%20paper%20Authors%20copy.pdf en eng Wiley-Blackwell https://e-space.mmu.ac.uk/596735/ https://e-space.mmu.ac.uk/596735/2/Delaney%20C%202009%20Final%20paper%20Authors%20copy.pdf Delaney, CA </view/creators/Delaney=3ACA=3A=3A.html>, Hambrey, MJ </view/creators/Hambrey=3AMJ=3A=3A.html>, Christoffersen, P </view/creators/Christoffersen=3AP=3A=3A.html>, Glasser, NF </view/creators/Glasser=3ANF=3A=3A.html> and Hubbard, B </view/creators/Hubbard=3AB=3A=3A.html> (2009) Seasonal controls on deposition of Late Devensian glaciolacustrine sediments, Central ireland: Implications for the construction of a varve chronology for the British-Irish ice sheet. In: Glacial sedimentary processes and products. Wiley-Blackwell. ISBN 9781444304442 info:eu-repo/semantics/openAccess Book Section NonPeerReviewed 2009 ftmanchuniv 2023-01-29T07:20:19Z Laminated pro-glacial glaciolacustrine sediments dating from the Late Devensian (22-10,000 bp) from central Ireland were examined using a combination of detailed logging and scanning electron microscope surface texture and fabric analyses. The sediments are rhythmically laminated and consist of coarser, pale silt layers which alternate with darker clay layers containing occasional thin laminae of fine sand and coarse silt. The pale silt layers contain grains with surface textures indicative of a combination of fluvial, glacial and aeolian transport and contain single or multiple normally graded laminae, erosional surfaces and soft sediment deformation structures, indicating deposition from multiple high density underflows, with occasional dumping of wind-blown sediment into the lake. The dark clay layers have sharp upper and lower contacts and an internal fabric consistent with deposition from a combination of flocculation and grain-by-grain deposition. The thin laminae of coarser material have surface textures consistent with subglacial and fluvial transport only and are interpreted as underflows from subglacial discharges. The sediments are interpreted as annually laminated (varved). Book Part Ice Sheet eSpace - Manchester Metropolitan University's Research Repository |
institution |
Open Polar |
collection |
eSpace - Manchester Metropolitan University's Research Repository |
op_collection_id |
ftmanchuniv |
language |
English |
description |
Laminated pro-glacial glaciolacustrine sediments dating from the Late Devensian (22-10,000 bp) from central Ireland were examined using a combination of detailed logging and scanning electron microscope surface texture and fabric analyses. The sediments are rhythmically laminated and consist of coarser, pale silt layers which alternate with darker clay layers containing occasional thin laminae of fine sand and coarse silt. The pale silt layers contain grains with surface textures indicative of a combination of fluvial, glacial and aeolian transport and contain single or multiple normally graded laminae, erosional surfaces and soft sediment deformation structures, indicating deposition from multiple high density underflows, with occasional dumping of wind-blown sediment into the lake. The dark clay layers have sharp upper and lower contacts and an internal fabric consistent with deposition from a combination of flocculation and grain-by-grain deposition. The thin laminae of coarser material have surface textures consistent with subglacial and fluvial transport only and are interpreted as underflows from subglacial discharges. The sediments are interpreted as annually laminated (varved). |
format |
Book Part |
author |
Delaney, CA Hambrey, MJ Christoffersen, P Glasser, NF Hubbard, B |
spellingShingle |
Delaney, CA Hambrey, MJ Christoffersen, P Glasser, NF Hubbard, B Seasonal controls on deposition of Late Devensian glaciolacustrine sediments, Central ireland: Implications for the construction of a varve chronology for the British-Irish ice sheet |
author_facet |
Delaney, CA Hambrey, MJ Christoffersen, P Glasser, NF Hubbard, B |
author_sort |
Delaney, CA |
title |
Seasonal controls on deposition of Late Devensian glaciolacustrine sediments, Central ireland: Implications for the construction of a varve chronology for the British-Irish ice sheet |
title_short |
Seasonal controls on deposition of Late Devensian glaciolacustrine sediments, Central ireland: Implications for the construction of a varve chronology for the British-Irish ice sheet |
title_full |
Seasonal controls on deposition of Late Devensian glaciolacustrine sediments, Central ireland: Implications for the construction of a varve chronology for the British-Irish ice sheet |
title_fullStr |
Seasonal controls on deposition of Late Devensian glaciolacustrine sediments, Central ireland: Implications for the construction of a varve chronology for the British-Irish ice sheet |
title_full_unstemmed |
Seasonal controls on deposition of Late Devensian glaciolacustrine sediments, Central ireland: Implications for the construction of a varve chronology for the British-Irish ice sheet |
title_sort |
seasonal controls on deposition of late devensian glaciolacustrine sediments, central ireland: implications for the construction of a varve chronology for the british-irish ice sheet |
publisher |
Wiley-Blackwell |
publishDate |
2009 |
url |
https://e-space.mmu.ac.uk/596735/2/Delaney%20C%202009%20Final%20paper%20Authors%20copy.pdf |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://e-space.mmu.ac.uk/596735/ https://e-space.mmu.ac.uk/596735/2/Delaney%20C%202009%20Final%20paper%20Authors%20copy.pdf Delaney, CA </view/creators/Delaney=3ACA=3A=3A.html>, Hambrey, MJ </view/creators/Hambrey=3AMJ=3A=3A.html>, Christoffersen, P </view/creators/Christoffersen=3AP=3A=3A.html>, Glasser, NF </view/creators/Glasser=3ANF=3A=3A.html> and Hubbard, B </view/creators/Hubbard=3AB=3A=3A.html> (2009) Seasonal controls on deposition of Late Devensian glaciolacustrine sediments, Central ireland: Implications for the construction of a varve chronology for the British-Irish ice sheet. In: Glacial sedimentary processes and products. Wiley-Blackwell. ISBN 9781444304442 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766031390658265088 |