Paleomagnetism of San Cristobal Island, Galapagos

Earth and Planetary Science Letters



Isla San Cristobal, the most easterly of the Galapagos Islands, consists of two parts: a large volcano constitutes the southwest half of the island and an irregular apron of small cones and flows makes up the northeast half. As some of the younger flows on the flanks of the large volcano are reversely magnetized, the minimum age of the volcano is 0.7 my, which is the age of the Brunhes-Matuyama reversal boundary. The true age is probably several times greater. The cones and flows to the northeast are all normally magnetized. The between-site angular dispersion of virtual poles is 11.3° - a value consistent with mathematical models for the latitude dependence of geomagnetic secular variation.

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    Publication type Article
    Publication Subtype Journal Article
    Title Paleomagnetism of San Cristobal Island, Galapagos
    Series title Earth and Planetary Science Letters
    DOI 10.1016/0012-821X(71)90158-0
    Volume 11
    Issue 1-5
    Year Published 1971
    Language English
    Publisher Elsevier
    Description 9 p.
    First page 152
    Last page 160
    Other Geospatial Galapagos
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