Revised age estimates of Brunhes palaeomagnetic events

support for a link between geomagnetism and eccentricity.

Research output: Contribution to journalArticle

Abstract

Revisions in the dates of reported geomagnetic excursions during the Brunhes Epoch are proposed in light of possible correlations between a section at Gioia Tauro, Italy, deep-sea cores, a core from Lake Biwa, Japan, and some lava flows. The anomalously long, double Blake Event reported at Gioia Tauro is here correlated with the Blake Event (approx 110kyr) and the Biwa 1 event (180+ or -5kyr); an hiatus may be present in the section between these two events. The alpha event at Gioia Tauro is correlated with the Biwa 2 event at about 295kyr; and the beta event with the 'Biwa 3' event at about 400kyr; the gamma event with the Snake River event at 480+ or - 50; and the delta event, not recorded elsewhere, is estimated to have occurred at approx 620kyr. These proposed refinements in the age estimates of the excursions suggest an approximately 100kyr cyclicity. If the events are real and the revised dating is correct, the timing of the geomagnetic events seems to coincide with times of peak eccentricity of the earth's orbit, suggesting a causal connection. -Author

Original languageEnglish (US)
Pages (from-to)1047-1050
Number of pages4
JournalGeophysical Research Letters
Volume8
Issue number10
StatePublished - 1981

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Brunhes chron
cyclicity
geomagnetism
hiatus
eccentricity
lava flow
deep sea
lake
estimates
river
dating
time measurement
Earth orbits
lava
lakes
Italy
rivers
Japan

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

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title = "Revised age estimates of Brunhes palaeomagnetic events: support for a link between geomagnetism and eccentricity.",
abstract = "Revisions in the dates of reported geomagnetic excursions during the Brunhes Epoch are proposed in light of possible correlations between a section at Gioia Tauro, Italy, deep-sea cores, a core from Lake Biwa, Japan, and some lava flows. The anomalously long, double Blake Event reported at Gioia Tauro is here correlated with the Blake Event (approx 110kyr) and the Biwa 1 event (180+ or -5kyr); an hiatus may be present in the section between these two events. The alpha event at Gioia Tauro is correlated with the Biwa 2 event at about 295kyr; and the beta event with the 'Biwa 3' event at about 400kyr; the gamma event with the Snake River event at 480+ or - 50; and the delta event, not recorded elsewhere, is estimated to have occurred at approx 620kyr. These proposed refinements in the age estimates of the excursions suggest an approximately 100kyr cyclicity. If the events are real and the revised dating is correct, the timing of the geomagnetic events seems to coincide with times of peak eccentricity of the earth's orbit, suggesting a causal connection. -Author",
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TY - JOUR

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AU - Rampino, Michael

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N2 - Revisions in the dates of reported geomagnetic excursions during the Brunhes Epoch are proposed in light of possible correlations between a section at Gioia Tauro, Italy, deep-sea cores, a core from Lake Biwa, Japan, and some lava flows. The anomalously long, double Blake Event reported at Gioia Tauro is here correlated with the Blake Event (approx 110kyr) and the Biwa 1 event (180+ or -5kyr); an hiatus may be present in the section between these two events. The alpha event at Gioia Tauro is correlated with the Biwa 2 event at about 295kyr; and the beta event with the 'Biwa 3' event at about 400kyr; the gamma event with the Snake River event at 480+ or - 50; and the delta event, not recorded elsewhere, is estimated to have occurred at approx 620kyr. These proposed refinements in the age estimates of the excursions suggest an approximately 100kyr cyclicity. If the events are real and the revised dating is correct, the timing of the geomagnetic events seems to coincide with times of peak eccentricity of the earth's orbit, suggesting a causal connection. -Author

AB - Revisions in the dates of reported geomagnetic excursions during the Brunhes Epoch are proposed in light of possible correlations between a section at Gioia Tauro, Italy, deep-sea cores, a core from Lake Biwa, Japan, and some lava flows. The anomalously long, double Blake Event reported at Gioia Tauro is here correlated with the Blake Event (approx 110kyr) and the Biwa 1 event (180+ or -5kyr); an hiatus may be present in the section between these two events. The alpha event at Gioia Tauro is correlated with the Biwa 2 event at about 295kyr; and the beta event with the 'Biwa 3' event at about 400kyr; the gamma event with the Snake River event at 480+ or - 50; and the delta event, not recorded elsewhere, is estimated to have occurred at approx 620kyr. These proposed refinements in the age estimates of the excursions suggest an approximately 100kyr cyclicity. If the events are real and the revised dating is correct, the timing of the geomagnetic events seems to coincide with times of peak eccentricity of the earth's orbit, suggesting a causal connection. -Author

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