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The amphibolite of Doir'a'Chatha (Durcha), Sutherland

Godfrey H. Francis
The amphibolite of Doir'a'Chatha (Durcha), Sutherland
Geological Magazine (1958) 95 (1): 25-39


A banded amphibolite occurs at Durcha, near Invercassley, in northern Scotland, which has been interpreted at one time or another as either igneous or sedimentary in origin with subsequent metamorphism. Investigation of the dark and light portions of the striped rock separately, chemically and petrographically, leads to the conclusion that the dark, hornblendic portion probably represents a pre-orogenic dolerite sill in Moine psammitic sediments. Metamorphism then resulted in a series of s-planes, along which lit-par-lit injection of quartz-feldspathic material took place. The origin of other occurrences of striped rocks in Scotland that have been described as similar to the Durcha rocks is considered. One new chemical analysis and trace element determinations on the amphibolite and on the Ben Vrackie epidiorite are included.

ISSN: 0016-7568
EISSN: 1469-5081
Coden: GEMGA4
Serial Title: Geological Magazine
Serial Volume: 95
Serial Issue: 1
Title: The amphibolite of Doir'a'Chatha (Durcha), Sutherland
Author(s): Francis, Godfrey H.
Pages: 25-39
Published: 1958
Text Language: English
Publisher: Cambridge University Press, London, United Kingdom
Accession Number: 1958-001657
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N57°49'60" - N58°30'00", W05°25'00" - W03°34'60"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
Update Code: 1958
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