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The age of the Whin Sill
Author(s) -
Fitch F. J.,
Miller J. A.
Publication year - 1967
Publication title -
geological journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.721
H-Index - 54
eISSN - 1099-1034
pISSN - 0072-1050
DOI - 10.1002/gj.3350050202
Subject(s) - sill , geology , magmatism , carboniferous , geochemistry , petrology , paleontology , tectonics , structural basin
The Whin Sill and its related dykes are intruded into Carboniferous strata in the North of England. Together they form a distinct petrographical province in which basic magmatism appears to have been closely related to a single phase in the structural history of the area. The relevant stratigraphical, structural and isotopic evidence suggests to the authors that the Whin Sill suite was intruded during the Stephanian, around 295 ± 6 m.y. This conclusion is supported by twenty‐one new potassium‐argon age determinations accompanied by a petrographical study of the factors which cause discrepancy in isotopic results from Whin Sill rocks.