论文信息 - The stability and significance of magnetism in sedimentary rocks

The stability and significance of magnetism in sedimentary rocks

This study was undertaken to investigate whether sedimentary rocks can retain directions of magnetization through long intervals of geologic time. The method of investigation is to observe the angular relations of the directions of residual magnetization to the bedding in deformed structures, or in beds that were laid down in a random manner. Systematic relationships found indicate that the direction of magnetization in certain selected sedimentary rocks remains unchanged for at least 200 million years.

J. Graham

[1] E. Johnson,et al. Pre‐history of the Earth's magnetic field , 1948 .

[2] E. Cloos. OÖLITE DEFORMATION IN THE SOUTH MOUNTAIN FOLD, MARYLAND , 1947 .

[3] Charles Kittel,et al. Theory of the structure of ferromagnetic domains in films and small particles , 1946 .

[4] E. Johnson. The Limiting Sensitivity of an Alternating‐Current Method of Measuring Small Magnetic Moments , 1938 .

[5] J. Koenigsberger. Natural residual magnetism of eruptive rocks , 1938 .

[6] R. Chevallier. L’aimantation des laves de l’Etna et l’orientation du champ terrestre en Sicile du XIIe au XVIIe siècle , 1925 .

[7] T. Murphy,et al. Rock Magnetism as a Clue to Earth's Magnetic History , 1949 .

[8] A. Holmes. VII.—The Construction of a Geological Time-Scale , 1947, Transactions of the Glasgow Geological Society.

[9] R. Chevallier,et al. Propriétés thermomagnétiques des roches volcaniques , 1932 .

[10] H. Osborn. The titanotheres of ancient Wyoming, Dakota, and Nebraska , 1929 .