Caledonian igneous activity

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Authors:Stillman, C. J.
Volume Title:geology of Ireland
Volume Authors:Holland, C. H., editor
Source:A geology of Ireland, edited by C. H. Holland, p.83-106. Publisher: John Wiley & Sons, New York, NY, United States. ISBN: 0-470-27247-3
Publication Date:1981
Note:In English. 19 refs.A Halsted Press book; illus. incl. 3 tables, geol. sketch maps
Summary:The Caledonian orogen in Ireland comprises two parts which closed over different periods of time. The orthotectonic belt of the NW involved deposition, metamorphism and deformation with eruptive volcanism during deposition, together with basic and ultrabasic intrusions as in Connemara and on the Mayo-Tyrone volcanic line, but the main activity was the emplacement of the granitic plutons of Donegal and Connemara. The paratectonic belt of the south and east closed later at the end of the Silurian with much less metamorphism and deformation, the junction between the plates being here referred to as the 'Caledonian suture'. South of the suture extensive volcanic arcs developed in Upper Ordovician times, ranging from andesite-rhyolite to calc-alkaline basalts. [R.A.H.]
Subjects:Caledonian Orogeny; Cambrian; Composition; Dalradian; Eruptions; Igneous rocks; Ordovician; Orogeny; Paleozoic; Petrography; Petrology; Volcanic rocks; Volcanism; Caledonides; Europe; Ireland; Western Europe; Evolution; Igneous activity; Orogenic Volcanic Series; Petrogenesis; Tyrone Igneous Group
Abstract Numbers:82M/1918
Record ID:1982036558
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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