Factors affecting the dynamics of the North Karelian/Oulu Ice Lobe, Central Finland, during the last deglaciation – a LiDAR and DEM interpretation of subglacial lineation patterns
The SIS (Scandinavian Ice Sheet) became divided into several active, semi-independent ice lobes during the last deglaciation ca 13 000–10 000 years ago. The largest of them, the North Karelian/Oulu Ice Lobe (NKIL/OIL), covered vast areas in central Finland and in northwest Russian Karelia. This pape...
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ftdoajarticles:oai:doaj.org/article:168f7874f1164ec094c76eb597d1c4c4 2023-05-15T16:40:28+02:00 Factors affecting the dynamics of the North Karelian/Oulu Ice Lobe, Central Finland, during the last deglaciation – a LiDAR and DEM interpretation of subglacial lineation patterns T. Nikarmaa J.P. Lunkka N. Putkinen 2017-12-01T00:00:00Z https://doi.org/10.17741/bgsf/89.2.003 https://doaj.org/article/168f7874f1164ec094c76eb597d1c4c4 EN eng Geological Society of Finland http://www.geologinenseura.fi/bulletin/Volume89/Bulletin_vol89_2_100-120_2017_Nikarmaa-etal.pdf https://doaj.org/toc/0367-5211 https://doaj.org/toc/1799-4632 doi:10.17741/bgsf/89.2.003 0367-5211 1799-4632 https://doaj.org/article/168f7874f1164ec094c76eb597d1c4c4 Bulletin of the Geological Society of Finland, Vol 89, Iss 2, Pp 100-120 (2017) LiDAR Scandinavian ice sheet Oulu Northern Ostrobothnia glacial lineations streamlined formations Mega-scale glacial lineations Kalevala end moraine Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.17741/bgsf/89.2.003 2022-12-31T01:51:51Z The SIS (Scandinavian Ice Sheet) became divided into several active, semi-independent ice lobes during the last deglaciation ca 13 000–10 000 years ago. The largest of them, the North Karelian/Oulu Ice Lobe (NKIL/OIL), covered vast areas in central Finland and in northwest Russian Karelia. This paper studies the behaviour and subglacial conditions of the NKIL/OIL with the inversion modelling method. The method is based on the identification and interpretation of mapped glacigenic streamlined lineations, formed during active flow stages of the NKIL/OIL. DEM and LiDAR data on lineations was obtained from seven subsets in different zones of the NKIL/OIL. Results indicate that the NKIL/OIL dynamics were strongly affected by pre-existing Quaternary sediment thickness, bedrock lithology, structures and topography. Due to these factors, the NKIL/ OIL operated through several flow corridors and had several retreat and re-advance cycles throughout its life span. Article in Journal/Newspaper Ice Sheet karelia* karelian Directory of Open Access Journals: DOAJ Articles Bulletin of the Geological Society of Finland 89 2 100 120 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
LiDAR Scandinavian ice sheet Oulu Northern Ostrobothnia glacial lineations streamlined formations Mega-scale glacial lineations Kalevala end moraine Geology QE1-996.5 |
spellingShingle |
LiDAR Scandinavian ice sheet Oulu Northern Ostrobothnia glacial lineations streamlined formations Mega-scale glacial lineations Kalevala end moraine Geology QE1-996.5 T. Nikarmaa J.P. Lunkka N. Putkinen Factors affecting the dynamics of the North Karelian/Oulu Ice Lobe, Central Finland, during the last deglaciation – a LiDAR and DEM interpretation of subglacial lineation patterns |
topic_facet |
LiDAR Scandinavian ice sheet Oulu Northern Ostrobothnia glacial lineations streamlined formations Mega-scale glacial lineations Kalevala end moraine Geology QE1-996.5 |
description |
The SIS (Scandinavian Ice Sheet) became divided into several active, semi-independent ice lobes during the last deglaciation ca 13 000–10 000 years ago. The largest of them, the North Karelian/Oulu Ice Lobe (NKIL/OIL), covered vast areas in central Finland and in northwest Russian Karelia. This paper studies the behaviour and subglacial conditions of the NKIL/OIL with the inversion modelling method. The method is based on the identification and interpretation of mapped glacigenic streamlined lineations, formed during active flow stages of the NKIL/OIL. DEM and LiDAR data on lineations was obtained from seven subsets in different zones of the NKIL/OIL. Results indicate that the NKIL/OIL dynamics were strongly affected by pre-existing Quaternary sediment thickness, bedrock lithology, structures and topography. Due to these factors, the NKIL/ OIL operated through several flow corridors and had several retreat and re-advance cycles throughout its life span. |
format |
Article in Journal/Newspaper |
author |
T. Nikarmaa J.P. Lunkka N. Putkinen |
author_facet |
T. Nikarmaa J.P. Lunkka N. Putkinen |
author_sort |
T. Nikarmaa |
title |
Factors affecting the dynamics of the North Karelian/Oulu Ice Lobe, Central Finland, during the last deglaciation – a LiDAR and DEM interpretation of subglacial lineation patterns |
title_short |
Factors affecting the dynamics of the North Karelian/Oulu Ice Lobe, Central Finland, during the last deglaciation – a LiDAR and DEM interpretation of subglacial lineation patterns |
title_full |
Factors affecting the dynamics of the North Karelian/Oulu Ice Lobe, Central Finland, during the last deglaciation – a LiDAR and DEM interpretation of subglacial lineation patterns |
title_fullStr |
Factors affecting the dynamics of the North Karelian/Oulu Ice Lobe, Central Finland, during the last deglaciation – a LiDAR and DEM interpretation of subglacial lineation patterns |
title_full_unstemmed |
Factors affecting the dynamics of the North Karelian/Oulu Ice Lobe, Central Finland, during the last deglaciation – a LiDAR and DEM interpretation of subglacial lineation patterns |
title_sort |
factors affecting the dynamics of the north karelian/oulu ice lobe, central finland, during the last deglaciation – a lidar and dem interpretation of subglacial lineation patterns |
publisher |
Geological Society of Finland |
publishDate |
2017 |
url |
https://doi.org/10.17741/bgsf/89.2.003 https://doaj.org/article/168f7874f1164ec094c76eb597d1c4c4 |
genre |
Ice Sheet karelia* karelian |
genre_facet |
Ice Sheet karelia* karelian |
op_source |
Bulletin of the Geological Society of Finland, Vol 89, Iss 2, Pp 100-120 (2017) |
op_relation |
http://www.geologinenseura.fi/bulletin/Volume89/Bulletin_vol89_2_100-120_2017_Nikarmaa-etal.pdf https://doaj.org/toc/0367-5211 https://doaj.org/toc/1799-4632 doi:10.17741/bgsf/89.2.003 0367-5211 1799-4632 https://doaj.org/article/168f7874f1164ec094c76eb597d1c4c4 |
op_doi |
https://doi.org/10.17741/bgsf/89.2.003 |
container_title |
Bulletin of the Geological Society of Finland |
container_volume |
89 |
container_issue |
2 |
container_start_page |
100 |
op_container_end_page |
120 |
_version_ |
1766030862101512192 |