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Cyclic geomagnetic changes in Mid‐Cretaceous rhythmites, Italy
Author(s) -
Napoleone Giovanni,
Ripepe Maurizio
Publication year - 1989
Publication title -
terra nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.353
H-Index - 89
eISSN - 1365-3121
pISSN - 0954-4879
DOI - 10.1111/j.1365-3121.1989.tb00406.x
Subject(s) - geology , cretaceous , secular variation , earth's magnetic field , pelagic zone , paleontology , variation (astronomy) , range (aeronautics) , geomagnetic reversal , geophysics , oceanography , astronomy , magnetic field , physics , materials science , quantum mechanics , composite material
Magnetic secular variation is recorded as a quasi‐rhythmical process of uncertain origin. Rhythmic changes recorded in the Scisti a Fucoidi in the central Apennines of Italy, pelagic sediments of Mid‐Cretaceous (Late Albian) age, show strong correspondence to patterns of orbital variation. In the same strata cyclic magnetic variations are found with peaks in the same range (105, 40, 26,19 kyr). These results appear to support earlier suggestions that secular variations may be related to these astronomical patterns.