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The significance of primary structures in the Ordovician pillow lava sequence of Western Norway in an understanding of major fold pattern

Published online by Cambridge University Press:  01 May 2009

H. Furnes  and
F. J. Skjerlie
H. Furnes
Affiliation:
Geologisk institutt, avd. A J. Frielesgt. 1 5000 Bergen, Norway
F. J. Skjerlie
Affiliation:
Geologisk institutt, avd. A J. Frielesgt. 1 5000 Bergen, Norway
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Summary

The present paper deals with the Lower Ordovician–Silurian rocks between Fördefjord and Sognefjord on the western coast of Norway. During the Caledonian orogeny this sequence was subjected to several phases of Silurian deformation, the first of which resulted in the formation of a large-scale anticline (the Stavfjord Anticline), which now occupies part of an overthrust unit. On the basis of ‘way-up’ criteria in the partly well-preserved Lower Ordovician pillow lavas it has been possible to determine with some confidence the geometry of the Stavfjord Anticline, its probable regional extension and the position of the axial plane trace. Arcuate deflections in the trend of this axial plane trace are a result of large-scale refolding, the later fold axes having WNW–ESE trends.

Type
Articles
Information
Geological Magazine , Volume 109 , Issue 4 , July 1972 , pp. 315 - 322
Copyright
Copyright © Cambridge University Press 1972

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References

Fuller, R. E. 1931. The Aqueous Chilling of Basaltic lava on the Columbia River Plateau. Am. J. Sci. 21, 281–300.CrossRefGoogle Scholar
Furnes, H. 1972. Meta-hyaloclastite breccias associated with Ordovician pillow lavas in the Solund area, W. Norway Norsk geol. Tidsskr. (in press).Google Scholar
Höisæter, T. 1971. Thrust Devonian Sediments in the Kvamshesten area, Western Norway. Geol. Mag. 108, 287–92.CrossRefGoogle Scholar
Kolderup, N.-H. 1921. Der Mangeritsyenit und umgebende Gesteine zwischen Dalsfjord und Stavfjord in Söndfjord im Westlichen Norwegen. Bergens Mus. Aarb. 1920–21, Nr. 5.Google Scholar
Kolderup, N.-H. 1928. Fjellbygningen i Kystströket mellom Nordfjord og Sognefjord. Bergens Mus. Aarb. 1928, Nat. vit. rk. Nr. 1.Google Scholar
Macdonald, G. A. 1967. Form and Structures of Extrusive Basaltic Rocks. Basalts: The Poldervaart Treatise on Rocks of Basaltic Composition, Vol. 1, 1–61.Google Scholar
Nilsen, T. H. 1968. The Relationship of Sedimentation to the Tectonics in the Solund Devonian District of southwestern Norway. Norg. geol. Unders. 258, 1–108.Google Scholar
Shrock, R. R. 1948. Sequence in Layered Rocks. McGraw-Hill Book Company Inc., New York.Google Scholar
Skjerlie, F. J. 1969. The pre-Devonian Rocks in the Askvoll–Gaular Area and adjacent Districts, Western Norway. Norg. geol. Unders. 258, 325–59.Google Scholar
Skjerlie, F. J. 1971. Sedimentasjon og tektonisk utvikling i Kvamshestens devonfelt, Vest-Norge. Norg. geol. Unders. 270, 77–108.Google Scholar
Vogt, Th. 1928. Den norske fjellkjedens revolusjonshistorie. Norsk geol. Tidsskr. 10, 97–115.Google Scholar
Waters, A. C. 1960. Determining Direction of Flow in Basalts. Am. J. Sci. 258–A, 350–66.Google Scholar
Wolff, F. Chr. 1967. Geology of the Meråker area as a key to the Eastern part of the Trondheim region. Norg. geol. Unders. 245. (Studies in the Trondheim Region, Central Norwegian Caledonides II). Part II.Google Scholar