Stranddünenwälle am Längsoszug Virttaankangas—Säkylänharju in SW-Finnland
Seven swarms of well-developed fossil transverse dunes, 2–7 m high and 100–2 000 m long, were formed after the Boreal age (5 000–6 000 B. C.) on the slopes of the Virttaa—Säkylä esker system running in a SE-NW direction east of Lake Pyhäjärvi in SW-Finland. These orientated sand dunes consist of pri...
Published in: | Bulletin of the Geological Society of Finland |
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Geological Society of Finland
1971
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ftdoajarticles:oai:doaj.org/article:518370e806814ea5b05c9f13b167e753 2023-05-15T16:38:15+02:00 Stranddünenwälle am Längsoszug Virttaankangas—Säkylänharju in SW-Finnland G. Glückert 1971-06-01T00:00:00Z https://doi.org/10.17741/bgsf/43.1.002 https://doaj.org/article/518370e806814ea5b05c9f13b167e753 EN eng Geological Society of Finland http://www.geologinenseura.fi/bulletin/Volume43/sgs_bt_043_1_pages_007_018.pdf https://doaj.org/toc/0367-5211 https://doaj.org/toc/1799-4632 doi:10.17741/bgsf/43.1.002 0367-5211 1799-4632 https://doaj.org/article/518370e806814ea5b05c9f13b167e753 Bulletin of the Geological Society of Finland, Vol 43, Iss 1, Pp 7-18 (1971) Geology QE1-996.5 article 1971 ftdoajarticles https://doi.org/10.17741/bgsf/43.1.002 2022-12-31T01:29:22Z Seven swarms of well-developed fossil transverse dunes, 2–7 m high and 100–2 000 m long, were formed after the Boreal age (5 000–6 000 B. C.) on the slopes of the Virttaa—Säkylä esker system running in a SE-NW direction east of Lake Pyhäjärvi in SW-Finland. These orientated sand dunes consist of primary glaciofluvial material first sorted by littoral forces and then by aeolian activity. The position of these coastal dune ridges shows the direction of the ancient shore line. The 10 km 2 wide sand plateau of the Virttaankangas esker was deposited as a submarine delta in a broad crevasse in front of the stagnant margin of the melting continental ice cap. The steep-sloped Säkylä esker with its oblong dead-ice hollows, on the other hand, was mainly formed en- or subglacially in a narrow crevasse or tunnel under the thin, retreating ice. A dark layer of ashes with black-burned stubs in some dunes is an evidence of a fire which destroyed the pine forest on the esker complex for 100–150 years ago. Article in Journal/Newspaper Ice cap Directory of Open Access Journals: DOAJ Articles Bulletin of the Geological Society of Finland 43 1 7 18 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 G. Glückert Stranddünenwälle am Längsoszug Virttaankangas—Säkylänharju in SW-Finnland |
topic_facet |
Geology QE1-996.5 |
description |
Seven swarms of well-developed fossil transverse dunes, 2–7 m high and 100–2 000 m long, were formed after the Boreal age (5 000–6 000 B. C.) on the slopes of the Virttaa—Säkylä esker system running in a SE-NW direction east of Lake Pyhäjärvi in SW-Finland. These orientated sand dunes consist of primary glaciofluvial material first sorted by littoral forces and then by aeolian activity. The position of these coastal dune ridges shows the direction of the ancient shore line. The 10 km 2 wide sand plateau of the Virttaankangas esker was deposited as a submarine delta in a broad crevasse in front of the stagnant margin of the melting continental ice cap. The steep-sloped Säkylä esker with its oblong dead-ice hollows, on the other hand, was mainly formed en- or subglacially in a narrow crevasse or tunnel under the thin, retreating ice. A dark layer of ashes with black-burned stubs in some dunes is an evidence of a fire which destroyed the pine forest on the esker complex for 100–150 years ago. |
format |
Article in Journal/Newspaper |
author |
G. Glückert |
author_facet |
G. Glückert |
author_sort |
G. Glückert |
title |
Stranddünenwälle am Längsoszug Virttaankangas—Säkylänharju in SW-Finnland |
title_short |
Stranddünenwälle am Längsoszug Virttaankangas—Säkylänharju in SW-Finnland |
title_full |
Stranddünenwälle am Längsoszug Virttaankangas—Säkylänharju in SW-Finnland |
title_fullStr |
Stranddünenwälle am Längsoszug Virttaankangas—Säkylänharju in SW-Finnland |
title_full_unstemmed |
Stranddünenwälle am Längsoszug Virttaankangas—Säkylänharju in SW-Finnland |
title_sort |
stranddünenwälle am längsoszug virttaankangas—säkylänharju in sw-finnland |
publisher |
Geological Society of Finland |
publishDate |
1971 |
url |
https://doi.org/10.17741/bgsf/43.1.002 https://doaj.org/article/518370e806814ea5b05c9f13b167e753 |
genre |
Ice cap |
genre_facet |
Ice cap |
op_source |
Bulletin of the Geological Society of Finland, Vol 43, Iss 1, Pp 7-18 (1971) |
op_relation |
http://www.geologinenseura.fi/bulletin/Volume43/sgs_bt_043_1_pages_007_018.pdf https://doaj.org/toc/0367-5211 https://doaj.org/toc/1799-4632 doi:10.17741/bgsf/43.1.002 0367-5211 1799-4632 https://doaj.org/article/518370e806814ea5b05c9f13b167e753 |
op_doi |
https://doi.org/10.17741/bgsf/43.1.002 |
container_title |
Bulletin of the Geological Society of Finland |
container_volume |
43 |
container_issue |
1 |
container_start_page |
7 |
op_container_end_page |
18 |
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1766028537009012736 |