The evolution of the Lewisian complex in the Outer Hebrides

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Authors:Fettes, D. J.; Mendum, J. R.
Author Affiliations:Primary:
Br. Geol. Surv., Edinburgh, United Kingdom
Univ. Leicester, United Kingdom
Volume Title:Evolution of the Lewisian and comparable Precambrian high grade terrains
Volume Authors:Park, R. G., editor; Tarney, J.
Source:Geological Society Special Publications, Vol.27, p.27-44; Third Lewisian conference, Leicester, United Kingdom, Mar. 20-22, 1985, edited by R. G. Park and J. Tarney. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0305-8719. ISBN: 0-632-01683-3
Publication Date:1987
Note:In English. 47 refs.; illus. incl. 4 tables, sketch maps
Summary:The oldest rocks of the Outer Hebrides are a supracrustal sequence of metasediments, metavolcanics and associated layered basic rocks which formed at approx 2900 m.y. These rocks were buried or carried to deep levels in the crust where they were intruded by an extensive series of granodioritic and tonalitic magmas, probably during the period 2800-2900 m.y. These rocks were subjected to the polyphasal Scourian event which led to extensive migmatization, high-grade metamorphism and the development of a pervasive gneissic foliation; the culmination of this event occurred in the period 2600-2700 m.y. ago. [J.M.H.]
Subjects:Compression tectonics; Crust; Crystalline rocks; Deformation; Dikes; Diorites; Grade; Granites; Granodiorites; High-grade metamorphism; Igneous rocks; Intrusions; Lewisian; Lineaments; Metadiabase; Metaigneous rocks; Metamorphic rocks; Metamorphism; Metasedimentary rocks; Metavolcanic rocks; Migmatization; Petrology; Plutonic rocks; Precambrian; Proterozoic; Shear zones; Structural geology; Supracrustals; Tectonics; Tectonophysics; Tonalite; Uplifts; Upper Precambrian; Europe; Great Britain; Hebrides; Outer Hebrides; Scotland; United Kingdom; Western Europe; Barra; Evolution; Metanorite; Scourian
Abstract Numbers:89M/2543
Record ID:1988008453
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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