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On certain geological similarities between North-East Shetland and the Jotunheim area of Norway

Published online by Cambridge University Press:  01 May 2009

Derek Flinn
Derek Flinn
Affiliation:
Department of Geology, The University, Liverpool.
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Abstract

In a recent account of the geology of North-east Shetland (Flinn, 1958, Quart. Jour. Geol. Soc.) two nappes of crystalline rocks lying one above the other on a base of meta-sedimentary rocks were recognised. Comparison with the Norwegian geological literature followed by field investigations in Norway has shown many similarities with the Jotunheim area of Norway. In both areas two relatively rigid nappes were thrust one after the other over the surface of the earth to their present positions. In both areas the lower of the two nappes was emplaced first and was subjected to erosion giving rise to sediments which were deposited on the nappes (Phyllite Group of Shetland and the Valdres Sparagmites of Norway). These sedimentary groups had a similar history of formation, deformation, and metamorphism, but differed somewhat in materials because the source rocks were different, although several strikingly similar rock types are present as pebbles in both areas. The remains of the first nappe and the newly deposited sediments were overrun by the second nappe in both areas. The emplacement of these nappes gave rise to considerable deformation and metamorphism in the underlying rocks. If the metamorphic rocks of Shetland are of Caledonian age, as seems likely, then it is possible that the Valdres Sparagmites and the Phyllite Group are stratigraphically equivalent: they are certainly tectonically equivalent.

Type
Articles
Information
Geological Magazine , Volume 96 , Issue 6 , December 1959 , pp. 473 - 481
Copyright
Copyright © Cambridge University Press 1959

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References

Amin, M. S., 1954. Notes on the Ultrabasic body of Unst, Shetland Islands. Geol. Mag., xci, 399–406.CrossRefGoogle Scholar
Bugge, C., 1939. Hemsedal og Gol. Norges Geol. Undersøk. Nr. 153.Google Scholar
Dietrichson, B., 1945. Geologiske undersøkelser i Espedalen. Norges Geol. Undersøk. Nr. 163.Google Scholar
Dietrichson, B., 1950. Det kaledonske knute omrade i Gudbrandsdalen. Norges Geol. Tidskr., xxviii, 65–143.Google Scholar
Dietrichson, B., 1953. Pseudotachylit fra de kaledonske skyvesoner i Jotunheimens forgårder, Gudbrandsdalen, og deres dannelsesberingelser. Norges Geol. Undersøk., 1952, Nr. 184, p. 23.Google Scholar
Flinn, D., 1958. On the nappe structure of North-east Shetland. Quart Jour. Geol. Soc., cxiv, 107–136.CrossRefGoogle Scholar
Goldschmidt, V. M., 1916. Konglomeraterne inden Høifjeldskvartsen. Norges Geol. Undersøk., 1952, Nr. 77.Google Scholar
Holtedahl, O., 1953. Norges geologi. Norges Geol. Undersøk., Nr. 164, v. 1.Google Scholar
Kvale, A., 1953. Linear structures and their relation to movement in the Caledonides of Scandinavia and Scotland. Quart. Jour. Geol. Soc., cix, 51–73.CrossRefGoogle Scholar
Landmark, K., 1948. Geologiske undersøkelser Luster-Bøverdalen. Univ. Bergen Årbok Nat. rekke, Nr. 1, 1–57.Google Scholar
Oftedahl, C., 1949. Skyvedekkeridet centrale Norges sparagmittformasjon. Norges Geol. Tidskr., xxvii, 164–170.Google Scholar
Read, H. H., 1934. The metamorphic geology of Unst in the Shetland Islands. Quart. Jour. Geol. Soc., xc, 637–688.CrossRefGoogle Scholar
Strand, T., 1938. Nordre Etnedal. Norges Geol. Undersøk., Nr. 152.Google Scholar
Strand, T., 1941. Oversikt over fjellbygningen i Nordre Gudbrandsdalen. Norges Geol. Tidskr., 1940, xx, 271–274.Google Scholar
Strand, T., 1945 a. Structural petrology of the Bygdin conglomerate. Norges Geol. Tidskr., 1944, xxiv, 14–31.Google Scholar
Strand, T., 1945 b. Et basal konglomerat pa Anorthosit. Norges Geol. Tidskr., xxv, 350–359.Google Scholar
Strand, T., 1951 a. Sel and Vågå map areas. Norges Geol. Undersøk., Nr. 178.Google Scholar
Strand, T., 1951 b. Slidre. Norges Geol. Undersøk., Nr. 180.Google Scholar
Strand, T., 1954. Aurdal. Norges Geol. Undersøk., Nr. 185.Google Scholar
Strand, T., 1956. Gabbrokonglomeratet i Sjodalen. Norges Geol. Undersøk., 1955, Nr. 195, 43–56.Google Scholar