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Crustal age between the Clipperton and Clarion Fracture Zones
Author(s) -
Eittreim Stephen L.,
Ragozin Nikita,
Gnibidenko Helios S.,
Helsley Charles E.
Publication year - 1992
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/92gl02928
Subject(s) - geology , fracture zone , crust , ridge , equator , magnetic anomaly , cretaceous , seismology , geophysics , paleontology , latitude , geodesy
Magnetic anomalies of 52–80 Ma age have been mapped in the equatorial Pacific in a region where they were previously unrecognized. These anomalies, now at 7° N are best modeled with crustal rocks of negative inclination, apparently because the crust was formed at a spreading ridge that was south of the magnetic equator in Late Cretaceous‐Early Tertiary time. Magnetic anomalies recorded along a 5900‐km trackline that follows a flowline of crustal generation show one long period, from 12 to 31 Ma, of apparent constant half‐spreading rate over the 0 to 80 Ma represented.