Open AccessA PALAEOMAGNETIC STUDY OF JURASSIC AND CRETACEOUS SEDIMENTS
Author(s) -
Nairn A. E. M.
Publication year - 1957
Publication title -
geophysical journal international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0956-540X
DOI - 10.1111/j.1365-246x.1957.tb02884.x
Subject(s) - cretaceous , geology , weathering , paleontology , remanence , geochemistry , magnetization , magnetic field , physics , quantum mechanics
Summary. Representative samples of Cretaceous and Jurassic arenaceous rocks and some Jurassic limestone samples were collected. The arenaceous rocks were generally either too weakly magnetized for the measurement of their remanent magnetization, or were unstable; higher intensities of magnetization were recorded in the limestones. The magnetic directions of the few reversed Jurassic limestones indicate a pole position near Omsk. X‐ray analysis indicates that the detrital iron ore mineral present was goethite. It is concluded that the palaeomagnetic unsuitability of these Jurassic and Cretaceous deltaic deposits results from the weathering conditions in the source area.