Open AccessThe British Tertiary Igneous Province: Palaeomagnetism and Ages of Dykes, Lundy Island, Bristol Channel
Author(s) -
Mussett A. E.,
Dagley P.,
Eckford M.
Publication year - 1976
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1976.tb01250.x
Subject(s) - paleomagnetism , geology , igneous rock , polarity (international relations) , geochemistry , paleontology , chemistry , biochemistry , cell
Summary Of 66 dykes collected 52 gave stable directions: 44 reversed, 4 normal and 4 intermediate. The mean direction of magnetization was N3·6°,+62·7° (down,) equivalent to a pole position of 82·6°N, 155·0°E. This is significantly different from the present pole and displays right‐handed farsidedness. The bulk, at least, of the dykes fall within the apparent span 45–54 My. Yet they display approximately the same small proportion of normal dykes as do the older dyke swarms of the province which were formed during a different polarity period or periods.