LXVI. The remanent magnetism of some sedimentary rocks in Britain

Abstract

This paper describes a survey which was carried out to measure the natural remanent magnetism of Triassic sediments in England. Rocks from nine separate sites distributed over a wide area were found to have consistent polarizations, being magnetized in an approximately North East-South Westerly direction with dips significantly less than that of the present earth's field. Similar results were obtained for sediments of the Carboniferous and Old Red Sandstone periods taken from two other sites. Approximately half of the specimens showed reverse polarization. Tests were also made to measure the magnetic stability of the rocks. The possible implications of the results are discussed.