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Glacial or non-glacial origin for the Bigganjarga tillite, Finnmark, northern Norway
- Source :
- Geological Magazine. March, 1996, Vol. 133 Issue 2, p137, 9 p.
- Publication Year :
- 1996
-
Abstract
- Bigganjargga is the classic locality for the Varangian ice age in northern Scandinavia. The presence of two sets of striations on the underlying quartzite basement has been taken as evidence for a glacial origin of the Bigganjargga diamictite. However, soft-sediment surface structures on the underlying sandstone indicate that it was not consolidated when the diamictite was emplaced. Together with structures in the diamictite this shows that the deposit formed as a debris flow moving northwestwards over an unconsolidated substrate. There is no evidence for glacial origin or contribution for the diamictite material.
- Subjects :
- Norway -- Natural history
Glaciers -- Research
Earth sciences
Subjects
Details
- ISSN :
- 00167568
- Volume :
- 133
- Issue :
- 2
- Database :
- Gale General OneFile
- Journal :
- Geological Magazine
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.18333878