Sedimentation and water escape structures in some late Precambrian shallow marine sandstones from Finnmark, North Norway
ABSTRACT Water escape structures are abundant in the Grønnes Formation, a tectonically undeformed, late Precambrian shallow marine sandstone deposit in North Norway. Trough cross‐bedded sandstones of the current‐dominated shallow marine environment were frequently liquefied, presumably due to recurr...
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Online Access: | http://dx.doi.org/10.1111/j.1365-3091.1977.tb00129.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3091.1977.tb00129.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3091.1977.tb00129.x |
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crwiley:10.1111/j.1365-3091.1977.tb00129.x 2024-09-15T18:06:13+00:00 Sedimentation and water escape structures in some late Precambrian shallow marine sandstones from Finnmark, North Norway JOHNSON, HOWARD D. 1977 http://dx.doi.org/10.1111/j.1365-3091.1977.tb00129.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3091.1977.tb00129.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3091.1977.tb00129.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Sedimentology volume 24, issue 3, page 389-411 ISSN 0037-0746 1365-3091 journal-article 1977 crwiley https://doi.org/10.1111/j.1365-3091.1977.tb00129.x 2024-07-25T04:21:32Z ABSTRACT Water escape structures are abundant in the Grønnes Formation, a tectonically undeformed, late Precambrian shallow marine sandstone deposit in North Norway. Trough cross‐bedded sandstones of the current‐dominated shallow marine environment were frequently liquefied, presumably due to recurring seismic shocks. Subsequent dewatering resulted in deformation of the cross‐bedding and the formation of convolute lamination. A three‐fold upward vertical sequence developed where liquefaction occurred below the sediment‐water interface: convoluted bed → passively deformed bed → undeformed bed. The passively deformed bed resulted from differential subsidence of a relatively plastic bed above a liquefied bed. It is characterized by anticlinal ridges and sand volcanoes at the sites of vertical sediment extrusion, and synclinal troughs at the sites of lateral sediment movement. Liquefaction may have been induced by either tectonic (earthquake shocks) or non‐tectonic (storm‐induced microseisms) trigger mechanisms, or a combination of both. The restriction of such a high frequency of water escape structures to deposits immediately above a gentle regional unconformity lends support for a tectonic trigger mechanism. Article in Journal/Newspaper Finnmark North Norway Finnmark Wiley Online Library Sedimentology 24 3 389 411 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
ABSTRACT Water escape structures are abundant in the Grønnes Formation, a tectonically undeformed, late Precambrian shallow marine sandstone deposit in North Norway. Trough cross‐bedded sandstones of the current‐dominated shallow marine environment were frequently liquefied, presumably due to recurring seismic shocks. Subsequent dewatering resulted in deformation of the cross‐bedding and the formation of convolute lamination. A three‐fold upward vertical sequence developed where liquefaction occurred below the sediment‐water interface: convoluted bed → passively deformed bed → undeformed bed. The passively deformed bed resulted from differential subsidence of a relatively plastic bed above a liquefied bed. It is characterized by anticlinal ridges and sand volcanoes at the sites of vertical sediment extrusion, and synclinal troughs at the sites of lateral sediment movement. Liquefaction may have been induced by either tectonic (earthquake shocks) or non‐tectonic (storm‐induced microseisms) trigger mechanisms, or a combination of both. The restriction of such a high frequency of water escape structures to deposits immediately above a gentle regional unconformity lends support for a tectonic trigger mechanism. |
format |
Article in Journal/Newspaper |
author |
JOHNSON, HOWARD D. |
spellingShingle |
JOHNSON, HOWARD D. Sedimentation and water escape structures in some late Precambrian shallow marine sandstones from Finnmark, North Norway |
author_facet |
JOHNSON, HOWARD D. |
author_sort |
JOHNSON, HOWARD D. |
title |
Sedimentation and water escape structures in some late Precambrian shallow marine sandstones from Finnmark, North Norway |
title_short |
Sedimentation and water escape structures in some late Precambrian shallow marine sandstones from Finnmark, North Norway |
title_full |
Sedimentation and water escape structures in some late Precambrian shallow marine sandstones from Finnmark, North Norway |
title_fullStr |
Sedimentation and water escape structures in some late Precambrian shallow marine sandstones from Finnmark, North Norway |
title_full_unstemmed |
Sedimentation and water escape structures in some late Precambrian shallow marine sandstones from Finnmark, North Norway |
title_sort |
sedimentation and water escape structures in some late precambrian shallow marine sandstones from finnmark, north norway |
publisher |
Wiley |
publishDate |
1977 |
url |
http://dx.doi.org/10.1111/j.1365-3091.1977.tb00129.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3091.1977.tb00129.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3091.1977.tb00129.x |
genre |
Finnmark North Norway Finnmark |
genre_facet |
Finnmark North Norway Finnmark |
op_source |
Sedimentology volume 24, issue 3, page 389-411 ISSN 0037-0746 1365-3091 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-3091.1977.tb00129.x |
container_title |
Sedimentology |
container_volume |
24 |
container_issue |
3 |
container_start_page |
389 |
op_container_end_page |
411 |
_version_ |
1810443709846650880 |