Unusual features caused by lightning impact in West Greenland
Two lightning impacts are described from an area near the Inland Ice in West Greenland. The first lightning blasted an outcrop of metacherts. It subsequently split into two branches, which traversed rock outcrops and boulders, leaving behind two white almost straight lines, 30 m and 14 m long respec...
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ftuniaarhuspubl:oai:pure.atira.dk:publications/0a2a7c00-b1f2-11db-bee9-02004c4f4f50 2023-05-15T16:26:30+02:00 Unusual features caused by lightning impact in West Greenland Appel, P. Abrahamsen, N. Rasmussen, T. 2006 https://pure.au.dk/portal/da/publications/unusual-features-caused-by-lightning-impact-in-west-greenland(0a2a7c00-b1f2-11db-bee9-02004c4f4f50).html eng eng info:eu-repo/semantics/restrictedAccess Appel , P , Abrahamsen , N & Rasmussen , T 2006 , ' Unusual features caused by lightning impact in West Greenland ' , Geological Magazine , vol. 143 , pp. 737-741 . Lynnedslag Grønland Fulgurit jern-formation Lightning Magnetization Fulgurite Greenland Iron-formation article 2006 ftuniaarhuspubl 2020-07-18T20:27:09Z Two lightning impacts are described from an area near the Inland Ice in West Greenland. The first lightning blasted an outcrop of metacherts. It subsequently split into two branches, which traversed rock outcrops and boulders, leaving behind two white almost straight lines, 30 m and 14 m long respectively, where all lichens and plants were burned away. On the white lines the upper few millimetres of the traversed boulders were melted to a glass which subsequently peeled off by thermal expansion to leave a rough surface. Magnetic investigation of an amphibolite boulder found on the white line showed that a strong electric current indeed traversed the boulder. A few years later a second lightning impacted on a mountaintop close to the first impact. The second lightning left a trail on the rock surface covered by a thin layer of glass. The glass displays spectacular colours ranging from metallic blue, to red, yellow and green. Article in Journal/Newspaper Greenland Grønland Aarhus University: Research Greenland |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Lynnedslag Grønland Fulgurit jern-formation Lightning Magnetization Fulgurite Greenland Iron-formation |
spellingShingle |
Lynnedslag Grønland Fulgurit jern-formation Lightning Magnetization Fulgurite Greenland Iron-formation Appel, P. Abrahamsen, N. Rasmussen, T. Unusual features caused by lightning impact in West Greenland |
topic_facet |
Lynnedslag Grønland Fulgurit jern-formation Lightning Magnetization Fulgurite Greenland Iron-formation |
description |
Two lightning impacts are described from an area near the Inland Ice in West Greenland. The first lightning blasted an outcrop of metacherts. It subsequently split into two branches, which traversed rock outcrops and boulders, leaving behind two white almost straight lines, 30 m and 14 m long respectively, where all lichens and plants were burned away. On the white lines the upper few millimetres of the traversed boulders were melted to a glass which subsequently peeled off by thermal expansion to leave a rough surface. Magnetic investigation of an amphibolite boulder found on the white line showed that a strong electric current indeed traversed the boulder. A few years later a second lightning impacted on a mountaintop close to the first impact. The second lightning left a trail on the rock surface covered by a thin layer of glass. The glass displays spectacular colours ranging from metallic blue, to red, yellow and green. |
format |
Article in Journal/Newspaper |
author |
Appel, P. Abrahamsen, N. Rasmussen, T. |
author_facet |
Appel, P. Abrahamsen, N. Rasmussen, T. |
author_sort |
Appel, P. |
title |
Unusual features caused by lightning impact in West Greenland |
title_short |
Unusual features caused by lightning impact in West Greenland |
title_full |
Unusual features caused by lightning impact in West Greenland |
title_fullStr |
Unusual features caused by lightning impact in West Greenland |
title_full_unstemmed |
Unusual features caused by lightning impact in West Greenland |
title_sort |
unusual features caused by lightning impact in west greenland |
publishDate |
2006 |
url |
https://pure.au.dk/portal/da/publications/unusual-features-caused-by-lightning-impact-in-west-greenland(0a2a7c00-b1f2-11db-bee9-02004c4f4f50).html |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Grønland |
genre_facet |
Greenland Grønland |
op_source |
Appel , P , Abrahamsen , N & Rasmussen , T 2006 , ' Unusual features caused by lightning impact in West Greenland ' , Geological Magazine , vol. 143 , pp. 737-741 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766015421216980992 |