Unusual features caused by lightning impact in West Greenland

P. Appel; N. Abrahamsen; T. Rasmussen

Unusual features caused by lightning impact in West Greenland

P. Appel, N. Abrahamsen, T. Rasmussen

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

7 Citationer (Scopus)

Abstract

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.

Originalsprog	Engelsk
Tidsskrift	Geological Magazine
Vol/bind	143
Sider (fra-til)	737-741
Antal sider	5
ISSN	0016-7568
Status	Udgivet - 2006

Emneord

Lynnedslag, Grønland, Fulgurit, jern-formation

Citationsformater

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title = "Unusual features caused by lightning impact in West Greenland",

abstract = " 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.",

keywords = "Lynnedslag, Gr{\o}nland, Fulgurit, jern-formation, Lightning, Magnetization, Fulgurite, Greenland, Iron-formation",

author = "P. Appel and N. Abrahamsen and T. Rasmussen",

year = "2006",

language = "English",

volume = "143",

pages = "737--741",

journal = "Geological Magazine",

issn = "0016-7568",

publisher = "Cambridge University Press",

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TY - JOUR

T1 - Unusual features caused by lightning impact in West Greenland

AU - Appel, P.

AU - Abrahamsen, N.

AU - Rasmussen, T.

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

KW - Lynnedslag, Grønland, Fulgurit, jern-formation

KW - Lightning, Magnetization, Fulgurite, Greenland, Iron-formation

M3 - Journal article

SN - 0016-7568

VL - 143

SP - 737

EP - 741

JO - Geological Magazine

JF - Geological Magazine

ER -

Unusual features caused by lightning impact in West Greenland

Abstract

Emneord

Fingeraftryk

Citationsformater