Precambrian primary volcanic structures in the Alta-Kvænangen tectonic window, northern Norway
In a small area in the western part of the Alta-Kvænangen window it has been possible to reveal the presence of a minimum of six basaltic lava layers separated by tuff/tuffite beds. The lavas have well-preserved primary structures including pillow lava, columnar jointing, pillow breccia, and pipe ve...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
1978
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| Subjects: | |
| Online Access: | https://archive-ouverte.unige.ch/unige:163630 |
| Summary: | In a small area in the western part of the Alta-Kvænangen window it has been possible to reveal the presence of a minimum of six basaltic lava layers separated by tuff/tuffite beds. The lavas have well-preserved primary structures including pillow lava, columnar jointing, pillow breccia, and pipe vesicles, while massive lava lacking specific structures is common. The tuff/tuffite beds exhibit sedimentary bedding, graded bedding, and cross-bedding. Available evidence indicates a subaquatic 'mise en place' for all the rocks of Middavarre. |
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