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II.—The Archæan Rocks of the Rodil District, South Harris, Outer Hebrides

Published online by Cambridge University Press:  06 July 2012

Charles F. Davidson
Charles F. Davidson
Affiliation:
Museum of Practical Geology, London.
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Extract

The Archæan rocks of the southernmost part of the parish of Harris in the Outer Hebrides have long been known to include not only a wide variety of gneisses of igneous origin, but also a group of paragneisses which, along with presumably contemporaneous formations in Glenelg, Tiree, Iona and elsewhere, probably represent the most ancient sediments in Britain. Apart from early references by Macculloch (1819) and Heddle (1878, 1888, 1901), for practically all our present information on these gneisses we are indebted to Jehu and Craig (1927), who have made a reconnaissance survey over the whole chain of the Outer Hebrides and whose work forms the standard account of the geology of this region.

The present paper gives a description of the gneisses around the village of Rodil, a district of somewhat complex petrography and metamorphic history. The paragneisses present include crystalline limestones, calc-silicate rocks, garnet-kyanite-gneisses, graphite-schists, quartzites, and other schistose and gneissose rocks less easily described by short titles. These sediments have been intruded by sills or sheets of basic to ultrabasic composition, now represented by gneisses of the composition of eclogite, garnet-amphibolite, amphibolite, peridotite, pyroxenite, saxonite, websterite, and a series of rocks referred to under the portmanteau name of metagabbro—types akin to pyroxene-granulites and basic charnockites, often garnet-bearing, but locally with pyroxene and garnet replaced to a varying extent by hornblende and biotite. There is also present a large mass of anorthosite-gneiss bordered by metagabbros, both the feldspathic and basic rocks bearing frequent schlieren of eclogite, garnet-amphibolite, and amphibolite. The complex is traversed locally by acid and basic pegmatite dykes and sheets.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 61 , Issue 1 , 1944 , pp. 71 - 112
Copyright
Copyright © Royal Society of Edinburgh 1944

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References

References to Literature

Adams, F. D., 1929. “The geology of Ceylon,” Canadian Journ. Res., p. 425.CrossRefGoogle Scholar
Adams, F. D., and Barlow, A. E., 1910. “Geology of the Haliburton and Bancroft areas, Province of Ontario,” Mem. Geol. Surv. Canada, no. 6.CrossRefGoogle Scholar
Adams, L. H., 1939. “Elastic properties of materials of the earth's crust” in The Internal Constitution of the Earth, edited by Gutenberg, , New York and London.Google Scholar
Alderman, A. R., 1936. “Eclogites from the neighbourhood of Glenelg, Inverness-shire,” Quart. Journ. Geol. Soc. London, xcii, 488.CrossRefGoogle Scholar
Backlund, H. G., 1907. “Über ein Gneissmassiv im nördlichen Sibirien,” Trav. Mus. Géol. Pierre le Grand, I, 91.Google Scholar
Backlund, H. G., 1936. “Zur genetischen Deutung der Eklogite,” Geol. Rdsch., XXVII, 47.CrossRefGoogle Scholar
Baker, G., 1941. “Apatite crystals with coloured cores in Victorian granitic rocks,” Amer. Min., XXVI, 382.Google Scholar
Balk, R., 1931. “Structural geology of the Adirondack anorthosite,” Tschermak's Min. Petr. Mitth., XLI, 309.Google Scholar
Ball, S. H., 1941. “Gem Stones” in Minerals Yearbook, Review of 1940, p. 1408, Washington D.C.Google Scholar
Becke, F., 1882. “Die Gneissformation des niederösterreichischen Waldviertels,” Tschermak's Min. Petr. Mitth., iv, 189.Google Scholar
Beetz, P. F. W., 1933. “Geology of south-west Angola, between Cunene and Lunda Axis,” Trans. Geol. Soc. S. Africa, XXXVI, 137.Google Scholar
Bonney, T. G., 1899. “The parent rock of the diamond in South Africa,” Proc. Roy. Soc. London, LXV, 235.Google Scholar
Boswell, P. G. H., 1927. “On the distribution of purple zircon in British sedimentary rocks,” Min. Mag., XXI, 310.Google Scholar
Brauns, R., 1907. “Lichtschein bei Granat, Zirkon und Sapphir,” Neues Jahrb.für Min., I, 13.Google Scholar
Brière, Y., 1920 (i). “Les eclogites françaises–leur composition minèralogique et chimique: leur origine,” Bull. Soc. Franç. Minér., XLII, 72.Google Scholar
Brière, Y., 1920 (ii). “Sur une amphibolite à grenat, olivine et hypèrsthene,” Bull. Soc. Franç. Minér., XLIII, 300.Google Scholar
Brøgger, W. C., 1935. “On several Archäan rocks from the south coast of Norway: II. The South Norwegian hyperites and. their metamorphism,” Videnskaps-Akad. Skrifter, Mat.-Naturv. Kl., 1934, no. 1.Google Scholar
Bruce, E. L., and Russell, G. A., 1939. “Petrography of the crystalline limestones and quartzites of the Grenville Series,” Bull. Geol. Soc. Amer., I, 515.CrossRefGoogle Scholar
Buddington, A. F., 1939. “Adirondack igneous rocks and their metamorphism,” Mem. Geol. Soc. Amer., no. 7.CrossRefGoogle Scholar
Camsell, C., 1911. “A new diamond locality in the Tulameen district, British Columbia,” Econ. Geol., VI, 604.CrossRefGoogle Scholar
Carstens, C. W., 1920. “Norske peridotiter,” Norsk Geol. Tidsskrift, v, 1, 43.Google Scholar
Clough, C. T., 1910. “The geology of Glenelg, Lochalsh, and the south-east part of Skye,” Mem. Geol. Surv. Scotland.Google Scholar
Clough, C. T., and Pollard, W., 1899. “On spinel and forsterite from the Glenelg limestone (Inverness-shire),” Quart. Journ. Geol. Soc. London, LV, 372.CrossRefGoogle Scholar
Coomaraswamy, A. K., 1902. “The crystalline limestones of Ceylon,” Quart. Journ. Geol. Soc. London, LVIII, 399.CrossRefGoogle Scholar
Dixey, F., 1922. “The norite of Sierra Leone,” Quart. Journ. Geol. Soc. London, LXXVIII, 299.CrossRefGoogle Scholar
Dougal, J. W., 1928. “Observations on the geology of Lewis,” Trans. Edin. Geol. Soc., XII, 12.CrossRefGoogle Scholar
Dresser, J. A., 1913. “Preliminary report on the serpentine and associated rocks of Canada,” Mem. Geol. Surv. Canada, no. 22CrossRefGoogle Scholar
Drever, H. I., 1940. “The geology of Ardgour, Argyllshire,” Trans. Roy. Soc. Edin., LX, 141.Google Scholar
Dull, E., 1902. “Ueber die Eklogiter des Münchberger Gneissgebietes,” Geognostische Jahresberichte, XV, 148.Google Scholar
Von Eckermann, H., 1922 (i). “The rocks and contact minerals of Mansjö Mountain,” Geol. Fören. Förhandl. Stockholm, XLIV 203.CrossRefGoogle Scholar
Von Eckermann, H., 1922 (ii). “The alkali spinel of Mansjö Mountain,” Geol. Fören. Fòrhandl. Stockholm, XLIV, 757.CrossRefGoogle Scholar
Ernst, T., 1935. “Olivinknollen der Basalte als Bruchstücke alter Olivinfelse,” Nachr. Ges. Wiss. Göttingen, IV, N.F., 147.Google Scholar
Eskola, P., 1914. “On the petrology of the Orijärvi region in south-western Finland,” Bull. Comm. Geol. Finlande, no. 40, p. 90.Google Scholar
Eskola, P., 1921. “On the eclogites of Norway,” Videnskaps-Akad. Skrifter, Mat.-Naturv. Kl, no. 8.Google Scholar
Eskola, P., 1922. “The mineral facies of rocks,” Norsk Geol. Tidsskrift, VI, 142.Google Scholar
Eskola, P., 1939. Die Entstehung der Gesteine, Berlin.Google Scholar
Fiedler, A., 1936. “Über Verfiossungserscheinungen von Amphibolit mit diatektischen Lösungen in Östischen Erzgebirge,” Tschermak's Min. Petr. Mitth., XLVII, 470.Google Scholar
Fleischer, M., 1937. “The relation between chemical composition and physical properties in the garnet group,” Amer. Miner., XXII, 751.Google Scholar
Ghosh, P. K., 1941. “The charnockite series of Bastar State and western Jeypore,” Rec. Geol. Surv. India, LXXV, Prof. Paper 15.Google Scholar
Glastonbury, J. O. G., 1940. “Metamorphosed limestones and other calcareous sediments from the moraines,” Australasian Antarctic Expedition Scientific Reports, Ser. A, IV, no. 8.Google Scholar
Goldschmidt, V. M., 1916. “Geologisch-petrographische Studien im Hochgebirge des Südlichen Norwegens. IV. Übersicht der Eruptivgesteine im Kaledonischen Gebirge zwischen Stavanger und Trondhjem,” Videnskaps-Akad. Skrifter, Mat.- Naturv. Kl, no. 2.Google Scholar
Groves, A. W., 1935. “The charnockite series of Uganda, British East Africa,” Quart. Journ. Geol. Soc. London, XCI, 150.CrossRefGoogle Scholar
Groves, A. W., and Mourant, A. E., 1929. “Inclusions in the apatites of some igneous rocks,” Min. Mag., XXII, 92.Google Scholar
Hammer, W., 1926. “Eklogit und Peridotit in den mittleren Ötztaler Alpen,” Jahrb. geol. Bundesanst., LXXVI, 97.Google Scholar
Harker, A., 1891. “On various crystalline rocks,” Geol. Mag., p. 171.CrossRefGoogle Scholar
Harker, A., 1939. Metamorphism, London, 2nd edition.Google Scholar
Harker, A., 1941. The West Highlands and the Hebrides, Cambridge.Google Scholar
Heddle, M. F., 1878. “Chapters on the mineralogy of Scotland—augite, hornblende, and serpentinous change,” Trans. Roy. Soc. Edin., XXVIII, 546.Google Scholar
Heddle, M. F., 1888. A vertebrate fauna of the Outer Hebrides, by Harvie-Brown, J. A. and Buckley, T. E., p. 232.Google Scholar
Heddle, M. F., 1901. The mineralogy of Scotland, 2 vols., Edinburgh.Google Scholar
Henry, N. F. M., 1935. “Some data on the iron-rich hypersthenes,” Min. Mag., XXIV, 121.Google Scholar
Henry, N. F. M., 1942. “Lamellar structure in orthopyroxenes,” Min. Mag., XXVI, 179.Google Scholar
Hezner, L., 1903. “Ein Beitrage zur Kenntnis der Eklogite und Amphibolite, mit besonderer Berücksichtigung der Verkommnisse des mittleren Ötztals,” Tschermak's Min. Petr. Mitth., XXIV, 437, 505.CrossRefGoogle Scholar
Holland, T. H., 1896. “On the acicular inclusions in Indian garnets,” Rec. Geol. Surv. India, XXIX, 16.Google Scholar
Holland, T. H., 1900. “The charnockite series, a group of Archæan hypersthene rocks in peninsular India,” Mem. Geol. Surv. India, XXVIII, pt. 2.Google Scholar
Holmes, A., 1918. “The pre-Cambrian and associated rocks of the district of Mozambique,” Quart. Journ. Geol. Soc. London, LXXIV, 31.CrossRefGoogle Scholar
Holmes, A., 1936. “A contribution to the petrology of kimberlite and its inclusions,” Trans. Geol. Soc. S. Africa, XXXIX, 379.Google Scholar
Holway, R. S., 1904. “Eclogites in California,” Journ. Geol. Chicago, XII, 344.CrossRefGoogle Scholar
Jehu, T. J., and Craig, R. M., 1927. “Geology of the Outer Hebrides: Part IV. South Harris,” Trans. Roy. Soc. Edin., LV, 457.CrossRefGoogle Scholar
Jehu, T. J., 1934. “Geology of the Outer Hebrides: Part V. North Harris and Lewis,” Trans. Roy. Soc. Edin., LVII, 839.CrossRefGoogle Scholar
Johnston, R. A. A., 1915. “A list of Canadian mineral occurrences,” Mem. Geol. Surv. Canada, no. 74.CrossRefGoogle Scholar
Junner, N. R., 1936. “Gisements alluvionnaires de diamant de la Gold Coast,” Sect. de Géol. Appliquée, Congr. Intern, des Mines, VIIe Session, Paris, 1935.Google Scholar
Junner, N. R., 1940. “Geology of the Gold Coast and Western Togoland,” Bull. Gold Coast Geol. Surv., no. 11.Google Scholar
Kemp, J. F., 1921. “Geology of the Mount Marcy Quadrangle, Essex County,” Bull. New York State Museum, no. 229.Google Scholar
Kolderup, C. F., 1897. “Die Labradorfelse des westlichen Norwegens: I. Die Labradorfelsgebiet bei Ekersund und Soggendal,” Bergens Museums Aarbog, no. 5.Google Scholar
Kolderup, C. F., 1899. “Lofotens og Vesteraalens gabbrobergarter,” Bergens Museums Aarbog, no. 7.Google Scholar
Kolderup, C. F., 1904. “Die Labradorfelse des westlichen Norwegens: II. Die Labradorfelse in dem Bergensgebiete,” Bergens Museums Aarbog, no. 12.Google Scholar
Kolderup, C. F., 1934. “The geology of the Bergen arcs” in “The geology of parts of southern Norway,” Proc. Geol. Ass., XLV, 373.CrossRefGoogle Scholar
Kolderup, N. H., 1928. “Fjellbygningen i kyströket mellem Nordfjord og Sognefjord,” Bergens Museums Årbok, no. 8.Google Scholar
Kranck, E. H., 1935. “On the crystalline complex of Liverpool Land,” Meddel. om Gran., XCV, no. 7.Google Scholar
Krieger, M. H., 1937. “Geology of the Thirteenth Lake Quadrangle, New York,” Bull. New York State Museum, no. 308.CrossRefGoogle Scholar
Krishnan, M. S., 1924. “Note on cordierite in a cordierite gneiss from Madura district, Madras, India,” Min. Mag., XX, 248.Google Scholar
Lacroix, A., 1889. “Contributions a l'étude des gneiss à pyroxène et des roches à wérnerite,” Bull. Soc. Franç. Minér., XII, 83.Google Scholar
Lacroix, A., 1900. “Les roches basiques accompagnant les lherzolites et les ophites des Pyrénées,” Compt. Rend. Congr. Géol. Intern., VIII, 831.Google Scholar
Lacroix, A., 1917. “Les péridotites des Pyrénées et les autres roches intrusives non-feldspathiques qui les accompagnet,” Compt. Rend. Acad. Sc. Paris, CLXV, 381.Google Scholar
Lébédev, P. I., 1937. “Formation Podolienne à czarnockites (Contribution à la pétrographie du précambrien de l'Ukraïne occidentale),” Abstracts of papers, XVII Intern. Geol. Congress, U.S.S.R., p. 71.Google Scholar
Légoux, P., 1939. “Le massif de Man (Côte d'Ivoire),” Bull. Serv. Mines de l' Afrique Occidentale Française, no. 3.Google Scholar
Lehmann, J., 1884. Untersuchung über die Entstehung der altkrystallinischen Schiefergesteine auf das Sächsische Granulitbegirge, Bonn.Google Scholar
Macculloch, J., 1819. A Description of the Western Isles of Scotland, 3 vols., London.Google Scholar
Macgregor, A. G., 1931. “Clouded felspars and thermal metamorphism,” Min. Mag., XXII, 524.Google Scholar
Machatschki, F., 1929. “Über die Formel der monoklinen Amphibole und Pyroxene,” Zeits. Krist., LXXI, 219.Google Scholar
Mackie, W., 1923. “The source of the purple zircons in the sedimentary rocks of Scotland,” Trans. Edin. Geol. Soc., XI, 200.CrossRefGoogle Scholar
Mikkola, E., and Sahama, T. G., 1936. “The region to the south-west of the ‘granulite series’ in Lapland and its ultrabasics,” Comptes Rendus Soc. Géol. Finlande, IX ( = Bull. Comm. Géol. Finlande, no. 115), 357.Google Scholar
Mouta, F., and O'Donnell, H., 1933. Carte géologique de l'Angola: notice explicative, Lisbon (República Portuguesa: Ministério das Colonias).Google Scholar
Myres, W. M., and Anderson, C. O., 1925. “Garnet, its mining, milling, and utilisation,” Bull. U.S. Bur. of Mines, no. 256.Google Scholar
Norin, E., 1937. “Geology of Western Quruq Tagh, Eastern Tien-Shan,” Reports from the Scientific Expedition to the N.W. Provinces of China, Geology, III, no. 1, Stockholm.Google Scholar
Petersson, W., 1893. “Om Routivare järnmalmsfält: Norrbottens Län,” Geol. Fören. Förhandl. Stockholm, XV, 45.CrossRefGoogle Scholar
Von Philipsborn, H., 1930. “Die Mineralkomponenten des Pyroxengranuhts von Hartmannsdorf (Sa.),” Chemie der Erde, V, 233.Google Scholar
Rankama, K., 1938. “On the mineralogy of some members of the humite group found in Finland,” Comptes Rendus Soc. Géol. Finlande, XII (=Bull. Comm. Géol. Finlande, no. 123), 81.Google Scholar
Read, H. H., 1923. “The geology of the country round Banff, Huntly and Turriff,” Mem. Geol. Surv. Scotland.Google Scholar
Read, H. H., and Double, I. S., 1935. “On the occurrence of chondrodite in the Glenelg limestone of Inverness-shire,” Min. Mag., XXIV, 84.Google Scholar
Du Rietz, T., 1935. “Peridotites serpentines and soapstones of northern Sweden,” Geol. Fören. Förhandl. Stockholm, LVII, 133.CrossRefGoogle Scholar
Sahlstein, T. G., 1935. “Petrographie der Eklogiteinschlüssen in den Gneisen des südwestlichen Liverpool-Landes in Öst-Grønland,” Meddel. om Grøn., XCV, no. 5.Google Scholar
Sjögren, H., 1893. “En ny jernmalmstyp representerad af Routivare malmberg,” Geol. Fören. Förhandl. Stockholm, XV, 55.CrossRefGoogle Scholar
Stevens, A., 1914. “Notes on the geology of the Stornoway district of Lewis,” Trans. Geol. Soc. Glasgow, XV, 51.CrossRefGoogle Scholar
Stillwell, F. L., 1918. “The metamorphic rocks of Adelie Land,” Australasian Antarctic Expedition Scientific Reports, ser. A, III, part 1.Google Scholar
Sudovikov, N. G. [СУДОВИКОВ, Н. Г.], 1935. “Материалы по геологии ю.-3. части Кольского Полуострова, ” Труд. Ленингр. Геол. Треста [Trans. Leningr. Geol. Trust], Fasc. 10.Google Scholar
Tarr, W. A., and Keller, W. D., 1940. “Chert in the Grenville Marble, Ross Township, Renfrew County, Ontario,” Journ. Geol. Chicago, XLVIII, 196CrossRefGoogle Scholar
Teall, J. J. H., 1888. British petrography, London.Google Scholar
Teall, J. J. H., 1907. “The geological structure of the North-West Highlands of Scotland,” Mem. Geol. Surv. Great Britain.Google Scholar
Tilley, C. E., 1920. “The metamorphism of the pre-Cambrian dolomites of southern Eyre Peninsula, South Australia,” Geol. Mag., LVII, 449.CrossRefGoogle Scholar
Tilley, C. E., 1923. “The metamorphic limestones of Commonwealth Bay, Adelie Land,” Australasian Antarctic Expedition Scientific Reports, ser. A, III, 2.Google Scholar
Tilley, C. E., 1936. “The paragenesis of kyanite-eclogites,” Min. Mag., XXIV, 422.Google Scholar
Tilley, C. E., 1938. “Aluminous pyroxenes in metamorphosed limestones,” Geol. Mag., LXXV, 81.CrossRefGoogle Scholar
Tyler, S. A., Marsden, R. W., Grout, F. F., and Thiel, G. A., 1940. “Studies of the Lake Superior pre-Cambrian by accessory mineral methods,” Bull. Geol. Soc. America, LI, 1429.CrossRefGoogle Scholar
Wagner, P. A., 1928. “The evidence of the kimberlite pipes on the constitution of the outer part of the earth,” S. African Journ. Science, XXV, 127.Google Scholar
Warren, B. E., 1930. “The crystalline structure and chemical composition of the monoclinic amphiboles,” Zeits. Krist., LXXII, 493.Google Scholar
Washington, H. S., 1916. “An occurrence of pyroxenite and hornblendite in Bahia, Brazil,” Amer. Journ. Sci., CLXXXVIII, 79.Google Scholar
Wieseneder, H., 1937. “Eklogite und ‘Eklogitschale’ der Erde,” Zenlralbl. für Min., Geol., und Pal., Abt. A, p. 149.Google Scholar
Williams, A. F., 1932. The genesis of the diamond, 2 vols., London.Google Scholar