Re-evaluating the sub-Caledonian erosion surface at the border of the Caledonides in Enontekiö Lapland, north-western Finland
The sub‑Caledonian erosion surface in the northwesternmost tip of Finland lies almost horizontal under the Finnish Caledonides. In its most easterly part, east of the Valtijoki River, the erosion surface was assumed to be located in an elevated position. Recent mapping shows the elevation to be an i...
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Geographical Society of Finland
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fttsvojs:oai:journal.fi:article/9076 2023-05-15T16:06:13+02:00 Re-evaluating the sub-Caledonian erosion surface at the border of the Caledonides in Enontekiö Lapland, north-western Finland Lehtovaara, Jyrki J. 1985-02-01 https://fennia.journal.fi/article/view/9076 en eng Geographical Society of Finland https://fennia.journal.fi/article/view/9076 Copyright (c) 2014 Fennia Fennia; Vol 163 Nro 2 (1985); 365-368 Fennia - International Journal of Geography; Vol 163 No 2 (1985); 365-368 1798-5617 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 1985 fttsvojs 2020-09-30T22:46:09Z The sub‑Caledonian erosion surface in the northwesternmost tip of Finland lies almost horizontal under the Finnish Caledonides. In its most easterly part, east of the Valtijoki River, the erosion surface was assumed to be located in an elevated position. Recent mapping shows the elevation to be an illusion created mainly by the absence of the very steeply jointed Kalak Nappe schists that elsewhere cap the lower Caledonian units. The rock now exposed is a quartzite that has yielded to erosion, so causing the more common, undulating topography. The pre‑Caledonian basement had, however, been subject to fracturing that developed into broader zones of erosion such as the Valtijoki River valley or, as single fractures, was healed by diabase intrusions which seem to have fortified the foundations of some present‑day fells. Extrapolating the erosion surface to SE necessitates a greater evening of its inclination. Article in Journal/Newspaper Enontekiö Lapland Federation of Finnish Learned Societies: Scientific Journals Online Enontekiö ENVELOPE(23.632,23.632,68.386,68.386) Kalak ENVELOPE(27.055,27.055,70.611,70.611) |
institution |
Open Polar |
collection |
Federation of Finnish Learned Societies: Scientific Journals Online |
op_collection_id |
fttsvojs |
language |
English |
description |
The sub‑Caledonian erosion surface in the northwesternmost tip of Finland lies almost horizontal under the Finnish Caledonides. In its most easterly part, east of the Valtijoki River, the erosion surface was assumed to be located in an elevated position. Recent mapping shows the elevation to be an illusion created mainly by the absence of the very steeply jointed Kalak Nappe schists that elsewhere cap the lower Caledonian units. The rock now exposed is a quartzite that has yielded to erosion, so causing the more common, undulating topography. The pre‑Caledonian basement had, however, been subject to fracturing that developed into broader zones of erosion such as the Valtijoki River valley or, as single fractures, was healed by diabase intrusions which seem to have fortified the foundations of some present‑day fells. Extrapolating the erosion surface to SE necessitates a greater evening of its inclination. |
format |
Article in Journal/Newspaper |
author |
Lehtovaara, Jyrki J. |
spellingShingle |
Lehtovaara, Jyrki J. Re-evaluating the sub-Caledonian erosion surface at the border of the Caledonides in Enontekiö Lapland, north-western Finland |
author_facet |
Lehtovaara, Jyrki J. |
author_sort |
Lehtovaara, Jyrki J. |
title |
Re-evaluating the sub-Caledonian erosion surface at the border of the Caledonides in Enontekiö Lapland, north-western Finland |
title_short |
Re-evaluating the sub-Caledonian erosion surface at the border of the Caledonides in Enontekiö Lapland, north-western Finland |
title_full |
Re-evaluating the sub-Caledonian erosion surface at the border of the Caledonides in Enontekiö Lapland, north-western Finland |
title_fullStr |
Re-evaluating the sub-Caledonian erosion surface at the border of the Caledonides in Enontekiö Lapland, north-western Finland |
title_full_unstemmed |
Re-evaluating the sub-Caledonian erosion surface at the border of the Caledonides in Enontekiö Lapland, north-western Finland |
title_sort |
re-evaluating the sub-caledonian erosion surface at the border of the caledonides in enontekiö lapland, north-western finland |
publisher |
Geographical Society of Finland |
publishDate |
1985 |
url |
https://fennia.journal.fi/article/view/9076 |
long_lat |
ENVELOPE(23.632,23.632,68.386,68.386) ENVELOPE(27.055,27.055,70.611,70.611) |
geographic |
Enontekiö Kalak |
geographic_facet |
Enontekiö Kalak |
genre |
Enontekiö Lapland |
genre_facet |
Enontekiö Lapland |
op_source |
Fennia; Vol 163 Nro 2 (1985); 365-368 Fennia - International Journal of Geography; Vol 163 No 2 (1985); 365-368 1798-5617 |
op_relation |
https://fennia.journal.fi/article/view/9076 |
op_rights |
Copyright (c) 2014 Fennia |
_version_ |
1766402115107815424 |